A useful free resource should help you finish a real task: choose a passage, explain a graph, plan a lesson, create a diagram, or find a credible source. This guide brings together 48 tools, libraries, and learning platforms, with the free access model, a practical first step, and a limitation for each. Start with K5 Learning for printable reading practice, Incompetech for graph paper, OpenStax for textbooks, PhET for simulations, or OBS Studio for a recorded explanation. Use the finder below to build a small collection that fits your next lesson.

How this list was prepared

Provider documentation reviewed September 26, 2026. Picks are organized by use case, not benchmark scores. Illustrations are original SVG diagrams, not product screenshots. Check current features and availability on each linked official site.

FIND YOUR NEXT RESOURCE

Start with what you need to make or teach.

Search by name, task, or output. These links jump to the full notes below; the complete directory remains available when filters are applied.

48 resources available

Three small resource kits you can use together

A reading lesson

ReadWorks for a passage, ReadWriteThink for a word map, and OpenShot only if the explanation needs edited video. Begin with one passage and one evidence question.

A graphing lesson

Incompetech for paper, Desmos to check a prediction, and NCES Create a Graph for categorical data. Choose the chart type after deciding the question.

A sourced presentation

Library of Congress for primary sources, Zotero for reference notes, and Canva Education for eligible users to assemble the story. Preserve a source credit with every borrowed item.

What “free” means here: free public materials, a free software core, a limited free plan, or an eligible education offer. The comparison states which applies. The list is organized by task, not a universal ranking.

The shortlist, at a glance

ToolWorth considering forAccessFormat / workflow
01. ReadWorksText-based reading practiceFree accountPassages and question sets
02. ReadTheoryAdaptive reading practiceLimited free planOnline quizzes and progress
03. CommonLitLiterature and nonfictionFree library; paid servicesTexts and literacy lessons
04. K5 LearningElementary printable practiceFree worksheets; paid extrasPrintable worksheets
05. K12ReaderReading and language worksheetsFree printable resourcesWorksheets and lesson ideas
06. Ereading WorksheetsTargeted comprehension skillsFree web resourcesPrint and online exercises
07. ReadWriteThinkLiteracy lesson planningFree teaching resourcesLesson plans and printouts
08. StoryWeaverMultilingual storybooksFree story libraryStories, PDFs and translations
09. OpenStaxFree digital textbooksFree digital; paid printWeb textbooks and PDFs
10. OER CommonsDiscovering adaptable lessonsFree OER discoveryLessons and open materials
11. MERLOTFinding subject-specific materialsFree discovery platformLearning objects and reviews
12. MIT OpenCourseWareIndependent university-level studyFree course materialsNotes, assignments and videos
13. OpenLearnShort self-paced coursesFree coursesOnline study units
14. Khan AcademyExplanations plus skill practiceFree core learningVideos, articles and exercises
15. CK-12Flexible digital textbooksFree learning materialsFlexBooks and practice
16. Open Up ResourcesCoherent K–12 curriculumFree web curriculaMath and ELA course materials
17. Desmos Graphing CalculatorGraphing equations and pointsFree calculatorInteractive x–y graphs
18. GeoGebraGeometry and linked representationsFree noncommercial useGraphs and constructions
19. The Math Learning Center AppsVisual number senseFree math appsManipulatives and number lines
20. PolypadExploring math with manipulativesFree mathematical playgroundTiles and visual models
21. Math-DrillsPrintable math practiceFree worksheetsWorksheets and answer keys
22. Incompetech Graph PaperCustom printable gridsFree generatorsGraph paper PDF
23. NCES Create a GraphSimple classroom chartsFree browser toolBar, line, pie and XY charts
24. DatawrapperPublication-style chartsFree plan; paid upgradesCharts, maps and tables
25. PhET Interactive SimulationsExploring science through modelsFree simulationsInteractive science and math
26. Concord Consortium STEM Resource FinderModel-based investigationsFree classroom resourcesSTEM models and activities
27. NASA Learning ResourcesSpace and Earth scienceFree online materialsActivities, articles and media
28. HHMI BioInteractiveBiology with scientific evidenceFree teaching resourcesVideos, data and activities
29. Smithsonian Learning LabLearning from museum collectionsFree discovery; account to curateObjects and learning collections
30. Exploratorium Science SnacksHands-on science investigationsFree instructionsPhysical experiment guides
31. Canva EducationVisual teaching materialsFree for eligible K–12 usersSlides, worksheets and graphics
32. Adobe Express for EducationStudent visual storytellingFree eligible education accessGraphics and short videos
33. PhotopeaEditing layered images in a browserFree editor; paid extrasLayered images and exports
34. InkscapeScalable diagrams and artworkFree open-source softwareSVG vector graphics
35. GIMPDetailed raster image editingFree open-source softwareEdited photos and illustrations
36. AudacityRecording spoken explanationsFree open-source softwareAudio recordings and edits
37. OBS StudioScreen-based lesson recordingFree open-source softwareScreen and audio recordings
38. OpenShotEditing a short teaching videoFree open-source softwareEdited video files
39. ExcalidrawQuick explanatory sketchesFree editor; paid PlusSketch diagrams and whiteboards
40. draw.ioStructured diagrams and flowchartsFree diagram editorFlowcharts and concept maps
41. ZoteroOrganizing sources and citationsFree app; storage upgradesReference library and citations
42. Directory of Open Access JournalsDiscovering open-access journalsFree discoveryJournals and article records
43. ERICEducation literature discoveryFree search; full text variesResearch records and documents
44. COREFinding open research versionsFree public discoveryResearch records and full text
45. Project GutenbergClassic books for offline readingFree ebook libraryEPUB, HTML and other formats
46. Library of Congress EducationPrimary-source learningFree online resourcesSource sets and teaching guides
47. Wikimedia CommonsFinding reusable visual mediaFree media; licenses varyImages, diagrams and audio
48. OpenverseSearching openly licensed mediaFree media searchImage and audio discovery

Reading, comprehension & vocabulary

PICK 01 / Text-based reading practice

1. ReadWorks ↗

ReadWorks — editorial illustration of Passages and question sets; not a product screenshot
ReadWorks — editorial SVG illustration, not an actual product screenshot.

ReadWorks passages pair reading with questions that send learners back to the text. It is a useful starting point for building background knowledge across English, science, and social studies instead of assigning disconnected comprehension drills.

How to use it

Filter by topic and grade, preview the question set, then assign or print a passage. Ask learners to identify the sentence that supports each answer.

Keep in mind

An account is needed for classroom workflows. Its kindergarten and first-grade passages are intended for listening-level comprehension; do not assume every early-grade passage is independent decoding practice.

Explore ReadWorks ↗Official source: about.readworks.org ↗

Reading, comprehension & vocabulary

PICK 02 / Adaptive reading practice

2. ReadTheory ↗

ReadTheory — editorial illustration of Online quizzes and progress; not a product screenshot
ReadTheory — editorial SVG illustration, not an actual product screenshot.

ReadTheory adapts reading practice to learners and provides progress information. Consider it when students need different levels of practice, while keeping your own review of their written explanations alongside the platform results.

How to use it

Start with the free Basic plan, try a short practice session, and discuss one incorrect answer. Check whether the available weekly quizzes fit your teaching schedule.

Keep in mind

The pricing page currently lists one staff member, 30 students, limited weekly quizzes, and limited progress history on Basic. Unlimited practice is paid; this is not an unrestricted free subscription.

Explore ReadTheory ↗Official source: readtheory.org ↗

Reading, comprehension & vocabulary

PICK 03 / Literature and nonfiction

3. CommonLit ↗

CommonLit — editorial illustration of Texts and literacy lessons; not a product screenshot
CommonLit — editorial SVG illustration, not an actual product screenshot.

CommonLit brings literary and informational texts into one teaching library. It suits a lesson built around interpretation, evidence, and discussion, especially when a short text needs more context than a worksheet alone provides.

How to use it

Choose a text around your lesson objective, check its reading demands, and use a discussion question before asking for a short evidence-based response.

Keep in mind

The free library and paid school offerings are different products. Check current access for assessments, reporting, and curriculum services before planning around them.

Explore CommonLit ↗Official source: www.commonlit.org ↗

Reading, comprehension & vocabulary

PICK 04 / Elementary printable practice

4. K5 Learning ↗

K5 Learning — editorial illustration of Printable worksheets; not a product screenshot
K5 Learning — editorial SVG illustration, not an actual product screenshot.

K5 Learning is a practical stop for free comprehension worksheets and elementary practice. Start here for 2nd grade reading comprehension worksheets or 5th grade reading passages when a printable activity suits your lesson.

How to use it

Select the grade and skill, print a sample, and check that the vocabulary and question type fit the learner. Use the answer key to plan feedback, not just mark a score.

Keep in mind

Workbooks and membership extras can cost money. Grade labels are a starting point, so preview text difficulty rather than treating the label as a precise reading assessment.

Explore K5 Learning ↗Official source: www.k5learning.com ↗

Reading, comprehension & vocabulary

PICK 05 / Reading and language worksheets

5. K12Reader ↗

K12Reader — editorial illustration of Worksheets and lesson ideas; not a product screenshot
K12Reader — editorial SVG illustration, not an actual product screenshot.

K12Reader collects reading, spelling, grammar, and comprehension worksheets. It is useful for a focused practice sheet when you already know the skill you want to teach and do not need a complete learning platform.

How to use it

Find one worksheet for your target skill. Complete it yourself before class, then add a short extension asking learners to explain or create an example.

Keep in mind

Free classroom access is not permission to resell or republish a worksheet collection. Check the resource terms and retain its credit information.

Explore K12Reader ↗Official source: www.k12reader.com ↗

Reading, comprehension & vocabulary

PICK 06 / Targeted comprehension skills

6. Ereading Worksheets ↗

Ereading Worksheets — editorial illustration of Print and online exercises; not a product screenshot
Ereading Worksheets — editorial SVG illustration, not an actual product screenshot.

Ereading Worksheets organizes activities around reading skills such as inference, main idea, and text structure. It gives you a more precise starting point than searching for an undifferentiated reading comprehension test.

How to use it

Choose a single skill, preview a passage, and ask learners to explain why a distractor is wrong. Compare their reasoning across two passages.

Keep in mind

A worksheet score is evidence from one task, not a diagnosis or complete measure of reading ability. Review text suitability and on-page advertising before sharing.

Explore Ereading Worksheets ↗Official source: www.ereadingworksheets.com ↗

Reading, comprehension & vocabulary

PICK 07 / Literacy lesson planning

7. ReadWriteThink ↗

ReadWriteThink — editorial illustration of Lesson plans and printouts; not a product screenshot
ReadWriteThink — editorial SVG illustration, not an actual product screenshot.

ReadWriteThink provides literacy teaching ideas and printouts supported by NCTE. Use it to connect reading, discussion, and writing, or to plan a semantic mapping activity that builds vocabulary in context.

How to use it

Select a lesson for the age group, adapt the objective, and create a word map with a definition, example, related concept, and sentence from the text.

Keep in mind

Some older interactives or linked activities may depend on technology your device no longer supports. Check the individual activity before scheduling it.

Explore ReadWriteThink ↗Official source: www.readwritethink.org ↗

Reading, comprehension & vocabulary

PICK 08 / Multilingual storybooks

8. StoryWeaver ↗

StoryWeaver — editorial illustration of Stories, PDFs and translations; not a product screenshot
StoryWeaver — editorial SVG illustration, not an actual product screenshot.

Pratham Books’ StoryWeaver offers illustrated stories in many languages. It helps families and teachers build a reading collection around language and reading level rather than relying on a single commercial textbook.

How to use it

Find a short story in the learner’s language, read it together, and ask for a retelling using three events. Use the available download format for offline reading.

Keep in mind

Books and illustrations use CC BY 4.0 with attribution requirements; readalongs and videos have different terms. Verify the specific format before adapting or republishing it.

Explore StoryWeaver ↗Official source: storyweaver.org.in ↗

Open textbooks, courses & curriculum

PICK 09 / Free digital textbooks

9. OpenStax ↗

OpenStax — editorial illustration of Web textbooks and PDFs; not a product screenshot
OpenStax — editorial SVG illustration, not an actual product screenshot.

OpenStax publishes peer-reviewed textbooks through Rice University. It is a strong free resource for students who need sustained explanations, worked examples, and a coherent sequence rather than a collection of unrelated links.

How to use it

Choose the exact title and edition, read one chapter online, and download its PDF if you need offline study. Match the chapter to your course syllabus.

Keep in mind

Print editions and optional courseware are separate. Read the specific book license before adapting content; current licensing guidance includes noncommercial and share-alike conditions.

Explore OpenStax ↗Official source: openstax.org ↗

Open textbooks, courses & curriculum

PICK 10 / Discovering adaptable lessons

10. OER Commons ↗

OER Commons — editorial illustration of Lessons and open materials; not a product screenshot
OER Commons — editorial SVG illustration, not an actual product screenshot.

OER Commons helps educators discover openly licensed learning materials. Its value is the ability to look for a suitable lesson and then inspect reuse permissions, rather than assuming everything free on the internet can be edited.

How to use it

Search by topic and learning level, inspect the license and creator, then adapt one activity with a clear record of your changes and attribution.

Keep in mind

Licenses, quality, and completeness vary by item. A free-to-view resource is not automatically an open educational resource.

Explore OER Commons ↗Official source: help.oercommons.org ↗

Open textbooks, courses & curriculum

PICK 11 / Finding subject-specific materials

11. MERLOT ↗

MERLOT — editorial illustration of Learning objects and reviews; not a product screenshot
MERLOT — editorial SVG illustration, not an actual product screenshot.

MERLOT is a curated collection of online learning and support materials. Its discipline browsing and peer-review information are useful when you need a teaching resource outside the subjects covered by a familiar worksheet site.

How to use it

Browse a discipline, read the description and any review, then open the original material. Evaluate one activity against the learning outcome you need.

Keep in mind

MERLOT points to external materials, so access, licensing, and technical requirements must be checked at the destination. Not every listing has the same review history.

Explore MERLOT ↗Official source: www.merlot.org ↗

Open textbooks, courses & curriculum

PICK 12 / Independent university-level study

12. MIT OpenCourseWare ↗

MIT OpenCourseWare — editorial illustration of Notes, assignments and videos; not a product screenshot
MIT OpenCourseWare — editorial SVG illustration, not an actual product screenshot.

MIT OpenCourseWare makes course materials available for independent learning. Choose it for a structured exploration of a subject when you want assignments and lecture context, not just a quick summary or completion badge.

How to use it

Check prerequisites, choose one course, and follow its syllabus. Attempt an assignment before comparing your reasoning with any provided solutions.

Keep in mind

Material availability differs by course. OpenCourseWare does not provide enrollment, academic credit, or an MIT degree for working through the materials.

Explore MIT OpenCourseWare ↗Official source: ocw.mit.edu ↗

Open textbooks, courses & curriculum

PICK 13 / Short self-paced courses

13. OpenLearn ↗

OpenLearn — editorial illustration of Online study units; not a product screenshot
OpenLearn — editorial SVG illustration, not an actual product screenshot.

The Open University’s OpenLearn offers free courses and learning articles across subjects. It is a manageable entry point when you want to explore a new topic without committing to a full university syllabus.

How to use it

Filter by subject and study time, work through one unit, and write a short application of the concept. Check the course page for its completion features.

Keep in mind

A free course or participation statement is not the same as accredited university credit. Some tracking and completion features require an account.

Explore OpenLearn ↗Official source: www.open.edu ↗

Open textbooks, courses & curriculum

PICK 14 / Explanations plus skill practice

14. Khan Academy ↗

Khan Academy — editorial illustration of Videos, articles and exercises; not a product screenshot
Khan Academy — editorial SVG illustration, not an actual product screenshot.

Khan Academy combines explanations with practice in a sequenced learning environment. Use it when a student needs to revisit a prerequisite before moving on, especially in mathematics where gaps can compound.

How to use it

Choose one skill related to the current lesson, review an example, and complete a few exercises. Discuss an error before assigning more questions of the same type.

Keep in mind

Core courses and practice are free, but separate AI or institutional offerings can have different access terms. Do not assume every product carrying the brand has identical pricing.

Explore Khan Academy ↗Official source: blog.khanacademy.org ↗

Open textbooks, courses & curriculum

PICK 15 / Flexible digital textbooks

15. CK-12 ↗

CK-12 — editorial illustration of FlexBooks and practice; not a product screenshot
CK-12 — editorial SVG illustration, not an actual product screenshot.

CK-12 FlexBooks are customizable digital textbooks with explanations and activities that vary by subject. They are useful when you want a chapter-based resource while retaining flexibility over which concepts to assign.

How to use it

Find a FlexBook chapter, check its examples, and pair a reading section with a relevant practice activity. Keep a note of the version and link used.

Keep in mind

Not every book includes the same simulations, videos, or assessments. Inspect each chapter and its reuse conditions rather than assuming feature parity across the library.

Explore CK-12 ↗Official source: help.ck12.org ↗

Open textbooks, courses & curriculum

PICK 16 / Coherent K–12 curriculum

16. Open Up Resources ↗

Open Up Resources — editorial illustration of Math and ELA course materials; not a product screenshot
Open Up Resources — editorial SVG illustration, not an actual product screenshot.

Open Up Resources provides full course curricula on the web. It is worth considering when you need a sequence of lessons and supporting teaching materials, rather than a new worksheet for each day.

How to use it

Choose the subject, grade range, and edition, then examine a complete unit. Review teacher guidance and the progression between lessons before adapting it.

Keep in mind

Printed books, professional learning, and partner digital services can cost money. Free web curriculum access does not make every associated service free.

Explore Open Up Resources ↗Official source: access.openupresources.org ↗

Math, graph paper & data visualization

PICK 17 / Graphing equations and points

17. Desmos Graphing Calculator ↗

Desmos Graphing Calculator — editorial illustration of Interactive x–y graphs; not a product screenshot
Desmos Graphing Calculator — editorial SVG illustration, not an actual product screenshot.

Desmos is a useful x y graph maker for exploring equations, plotting points, and comparing functions. It turns a static answer into something learners can change and inspect as coefficients vary.

How to use it

Enter y = 2x + 1 and a small table of points. Change the coefficient of x, predict what will happen, and compare the prediction with the graph.

Keep in mind

A graph is not a complete mathematical explanation. Ask learners to explain intercepts and scale, and check which calculator version is permitted in any exam.

Explore Desmos Graphing Calculator ↗Official source: www.desmos.com ↗

Math, graph paper & data visualization

PICK 18 / Geometry and linked representations

18. GeoGebra ↗

GeoGebra — editorial illustration of Graphs and constructions; not a product screenshot
GeoGebra — editorial SVG illustration, not an actual product screenshot.

GeoGebra combines graphing, geometry, and other mathematical tools. It is useful when learners need to connect an equation, a geometric construction, and a visual explanation within one activity.

How to use it

Create a triangle or graph a function, then move one point or change one parameter. Ask which properties stay unchanged and why.

Keep in mind

Free use is subject to its noncommercial license. Online saving and sharing can require an account; check resource-specific terms and commercial-use conditions.

Explore GeoGebra ↗Official source: www.geogebra.org ↗

Math, graph paper & data visualization

PICK 19 / Visual number sense

19. The Math Learning Center Apps ↗

The Math Learning Center Apps — editorial illustration of Manipulatives and number lines; not a product screenshot
The Math Learning Center Apps — editorial SVG illustration, not an actual product screenshot.

The Math Learning Center offers visual tools such as fraction models, number lines, and geoboards. These visual teaching tools help make quantities and relationships visible before students move to abstract notation.

How to use it

Use a number line to represent a calculation, or build the same fraction with two models. Ask learners to explain how the image matches the symbols.

Keep in mind

These are focused manipulatives, not a full automated curriculum or gradebook. Plan the questions and feedback that make the activity instructional.

Explore The Math Learning Center Apps ↗Official source: www.mathlearningcenter.org ↗

Math, graph paper & data visualization

PICK 20 / Exploring math with manipulatives

20. Polypad ↗

Polypad — editorial illustration of Tiles and visual models; not a product screenshot
Polypad — editorial SVG illustration, not an actual product screenshot.

Polypad gives learners a canvas for arranging mathematical objects and exploring patterns. Use it for visual reasoning when a conventional worksheet leaves too little room to test an idea.

How to use it

Build two different representations of the same quantity or pattern. Save an explanation of the relationship so the final picture has mathematical context.

Keep in mind

A finished arrangement can hide weak reasoning. Pair the visual with a written or spoken explanation and check saving options before the lesson ends.

Explore Polypad ↗Official source: polypad.amplify.com ↗

Math, graph paper & data visualization

PICK 21 / Printable math practice

21. Math-Drills ↗

Math-Drills — editorial illustration of Worksheets and answer keys; not a product screenshot
Math-Drills — editorial SVG illustration, not an actual product screenshot.

Math-Drills offers printable practice across mathematics topics. Its coordinate activities can complement a lesson that starts with a blank Cartesian coordinate grid and moves into plotting points or graph art.

How to use it

Select a skill-specific sheet, inspect its scale and instructions, and complete one example with the learner. Use a small set of questions before assigning a whole page.

Keep in mind

Preview the worksheet and answer key. Repetition is useful only when the learner understands the underlying operation, and the site is not a personalized tutoring service.

Explore Math-Drills ↗Official source: math-drills.com ↗

Math, graph paper & data visualization

PICK 22 / Custom printable grids

22. Incompetech Graph Paper ↗

Incompetech Graph Paper — editorial illustration of Graph paper PDF; not a product screenshot
Incompetech Graph Paper — editorial SVG illustration, not an actual product screenshot.

Incompetech’s generators help when you need grid paper to print in a particular spacing or style. A graph paper PDF can serve math, drawing, measurement, or planning without requiring a paid worksheet pack.

How to use it

Select the grid style and page settings, generate the sheet, and print one sample at actual size. Measure the grid spacing if physical dimensions matter.

Keep in mind

Printer scaling and margins can change the result. A grid paper printable is a blank scaffold; you still need axes, labels, and a task appropriate to the lesson.

Explore Incompetech Graph Paper ↗Official source: incompetech.com ↗

Math, graph paper & data visualization

PICK 23 / Simple classroom charts

23. NCES Create a Graph ↗

NCES Create a Graph — editorial illustration of Bar, line, pie and XY charts; not a product screenshot
NCES Create a Graph — editorial SVG illustration, not an actual product screenshot.

NCES Create a Graph is a straightforward free bar graph maker with several chart types. It suits a small classroom dataset when the goal is to understand labels, scales, and the connection between numbers and a visual.

How to use it

Choose a bar chart, enter category names and values, and add a descriptive title and source. Preview before printing or downloading.

Keep in mind

The interface is older and print or download actions may need pop-ups enabled. Use non-sensitive sample data and check the exported chart for missing labels.

Explore NCES Create a Graph ↗Official source: nces.ed.gov ↗

Math, graph paper & data visualization

PICK 24 / Publication-style charts

24. Datawrapper ↗

Datawrapper — editorial illustration of Charts, maps and tables; not a product screenshot
Datawrapper — editorial SVG illustration, not an actual product screenshot.

Datawrapper is a bar chart creator and broader visualization tool for turning a small dataset into an annotated chart. It suits a class report or public explainer where the source, labels, and readable layout matter.

How to use it

Prepare a clean table, choose the chart form that matches the question, then add a source note and explanatory title. Check the result at phone size.

Keep in mind

The free plan has branding and feature boundaries. Confirm the current export and publishing terms before building a workflow that depends on a paid feature.

Explore Datawrapper ↗Official source: www.datawrapper.de ↗

Science, museums & inquiry

PICK 25 / Exploring science through models

25. PhET Interactive Simulations ↗

PhET Interactive Simulations — editorial illustration of Interactive science and math; not a product screenshot
PhET Interactive Simulations — editorial SVG illustration, not an actual product screenshot.

PhET provides interactive simulations that make otherwise invisible processes easier to explore. Use it to connect a prediction, a controlled change, and an observation rather than letting students click through without a question.

How to use it

Choose a forces simulation. Before changing a force, sketch free body diagram examples, predict the motion, and compare the simulation with the sketch.

Keep in mind

Simulations simplify reality. Identify what the model includes and leaves out, and check the device requirements and access to teacher materials in advance.

Explore PhET Interactive Simulations ↗Official source: phet.colorado.edu ↗

Science, museums & inquiry

PICK 26 / Model-based investigations

26. Concord Consortium STEM Resource Finder ↗

Concord Consortium STEM Resource Finder — editorial illustration of STEM models and activities; not a product screenshot
Concord Consortium STEM Resource Finder — editorial SVG illustration, not an actual product screenshot.

Concord Consortium’s resource finder collects STEM activities and models. It is a useful option when a lesson needs investigation and evidence gathering instead of a single demonstration.

How to use it

Choose an activity connected to the unit, identify one variable to change, and have students record a prediction and result in a small table.

Keep in mind

Some activities need accounts or specific browser capabilities. Run the activity on the classroom device and check teacher instructions before assigning it.

Explore Concord Consortium STEM Resource Finder ↗Official source: learn.concord.org ↗

Science, museums & inquiry

PICK 27 / Space and Earth science

27. NASA Learning Resources ↗

NASA Learning Resources — editorial illustration of Activities, articles and media; not a product screenshot
NASA Learning Resources — editorial SVG illustration, not an actual product screenshot.

NASA organizes learning resources for different audiences, bringing mission context into space and Earth science lessons. It is particularly useful for connecting a concept to an authentic scientific question or observation.

How to use it

Choose a resource for the learner’s age, identify its underlying science question, and ask learners to connect the evidence to a short claim.

Keep in mind

Materials vary in difficulty and format. Equipment-based activities may have real material costs, and individual media can carry separate credit or use requirements.

Explore NASA Learning Resources ↗Official source: www.nasa.gov ↗

Science, museums & inquiry

PICK 28 / Biology with scientific evidence

28. HHMI BioInteractive ↗

HHMI BioInteractive — editorial illustration of Videos, data and activities; not a product screenshot
HHMI BioInteractive — editorial SVG illustration, not an actual product screenshot.

HHMI BioInteractive offers biology teaching resources built around scientific work. Consider it when you want students to interpret evidence rather than memorize a description of an experiment.

How to use it

Select a resource, pause before its explanation, and ask students what the data support. Return to the evidence after watching or reading the interpretation.

Keep in mind

Some topics assume substantial biology knowledge. Preview the educator materials and vocabulary, and distinguish observations from the explanation students infer.

Explore HHMI BioInteractive ↗Official source: www.biointeractive.org ↗

Science, museums & inquiry

PICK 29 / Learning from museum collections

29. Smithsonian Learning Lab ↗

Smithsonian Learning Lab — editorial illustration of Objects and learning collections; not a product screenshot
Smithsonian Learning Lab — editorial SVG illustration, not an actual product screenshot.

Smithsonian Learning Lab connects museum resources with learning collections. It works well for an observation task where students compare objects, images, or documents and explain what they can actually infer.

How to use it

Choose two related objects, list visible details, and separate observation from interpretation. Build a collection around a clear question if you need a reusable lesson.

Keep in mind

Rights and metadata vary by object. A museum-hosted image is not automatically unrestricted, and collection context matters when interpreting an artifact.

Explore Smithsonian Learning Lab ↗Official source: learninglab.si.edu ↗

Science, museums & inquiry

PICK 30 / Hands-on science investigations

30. Exploratorium Science Snacks ↗

Exploratorium Science Snacks — editorial illustration of Physical experiment guides; not a product screenshot
Exploratorium Science Snacks — editorial SVG illustration, not an actual product screenshot.

Science Snacks provides instructions for hands-on investigations using approachable materials. It is a useful complement to digital resources when students need to observe a physical effect directly.

How to use it

Choose one activity, assemble the materials, and test the setup before class. Ask students to predict what will happen, record observations, and propose an explanation.

Keep in mind

Free instructions do not mean zero material cost. Follow the activity’s safety directions and choose a setup appropriate to the learners and supervision available.

Explore Exploratorium Science Snacks ↗Official source: www.exploratorium.edu ↗

Creating lessons, diagrams & video

PICK 31 / Visual teaching materials

31. Canva Education ↗

Canva Education — editorial illustration of Slides, worksheets and graphics; not a product screenshot
Canva Education — editorial SVG illustration, not an actual product screenshot.

Canva Education brings visual design and classroom features together. It is useful for turning a lesson outline into a readable handout or slide sequence when you want templates as a starting point.

How to use it

Confirm eligibility, choose a simple template, and replace decorative content with examples tied to the lesson. Test whether the text remains readable when printed.

Keep in mind

Education access depends on eligibility and verification. Higher education and other Canva plans have different terms; access to an asset does not imply unrestricted resale rights.

Explore Canva Education ↗Official source: www.canva.com ↗

Creating lessons, diagrams & video

PICK 32 / Student visual storytelling

32. Adobe Express for Education ↗

Adobe Express for Education — editorial illustration of Graphics and short videos; not a product screenshot
Adobe Express for Education — editorial SVG illustration, not an actual product screenshot.

Adobe Express for Education supports classroom visual projects such as posters and short explanations. It is useful when the learning outcome is communicating an idea rather than mastering a professional editing suite.

How to use it

Use the appropriate school access route, choose a short format, and require a source credit on any borrowed media. Assess clarity and evidence alongside visual polish.

Keep in mind

School administration and eligibility affect access. Check which assets, AI capabilities, and sharing features are available in the education environment you actually use.

Explore Adobe Express for Education ↗Official source: www.adobe.com ↗

Creating lessons, diagrams & video

PICK 33 / Editing layered images in a browser

33. Photopea ↗

Photopea — editorial illustration of Layered images and exports; not a product screenshot
Photopea — editorial SVG illustration, not an actual product screenshot.

Photopea provides a browser-based image editor with layers and PSD support. It is useful for repairing or adapting an existing visual when a simple slide editor cannot handle the file structure.

How to use it

Open a copy of the image, keep edits on separate layers, and export a web-friendly version. Retain the layered original for later changes.

Keep in mind

The interface has a learning curve and the free experience includes advertising. Large files depend on your device’s memory and performance.

Explore Photopea ↗Official source: www.photopea.com ↗

Creating lessons, diagrams & video

PICK 34 / Scalable diagrams and artwork

34. Inkscape ↗

Inkscape — editorial illustration of SVG vector graphics; not a product screenshot
Inkscape — editorial SVG illustration, not an actual product screenshot.

Inkscape is a vector graphics editor for diagrams, icons, and illustrations that need to stay sharp at different sizes. It suits custom vocabulary clipart or a labeled teaching diagram you expect to revise.

How to use it

Draw a simple concept with shapes and labels, group related elements, and save the editable SVG before exporting a copy for a worksheet.

Keep in mind

It requires a desktop installation and some practice with vector editing. Keep fonts and export settings consistent when sharing files with colleagues.

Explore Inkscape ↗Official source: inkscape.org ↗

Creating lessons, diagrams & video

PICK 35 / Detailed raster image editing

35. GIMP ↗

GIMP — editorial illustration of Edited photos and illustrations; not a product screenshot
GIMP — editorial SVG illustration, not an actual product screenshot.

GIMP is a desktop image editor for tasks such as cropping, retouching, and combining raster images. It is useful when you need a reusable local editing tool for classroom assets.

How to use it

Duplicate the source file, use layers for adjustments, and export a version at the size the worksheet or website needs. Preserve the editable project separately.

Keep in mind

Detailed editing takes time to learn. Check image permissions and avoid edits that change the meaning of evidence in scientific or historical materials.

Explore GIMP ↗Official source: www.gimp.org ↗

Creating lessons, diagrams & video

PICK 36 / Recording spoken explanations

36. Audacity ↗

Audacity — editorial illustration of Audio recordings and edits; not a product screenshot
Audacity — editorial SVG illustration, not an actual product screenshot.

Audacity records and edits audio on a computer. It is useful for a short listening activity, pronunciation model, or spoken explanation that learners can replay without loading a video.

How to use it

Record a short sample, listen with headphones, trim silence, and export an accessible audio file. Include a transcript so the explanation is available in text too.

Keep in mind

Microphone quality and room noise affect the result. Optional services are separate from the editor, and editing cannot fully repair a poor recording.

Explore Audacity ↗Official source: www.audacityteam.org ↗

Creating lessons, diagrams & video

PICK 37 / Screen-based lesson recording

37. OBS Studio ↗

OBS Studio — editorial illustration of Screen and audio recordings; not a product screenshot
OBS Studio — editorial SVG illustration, not an actual product screenshot.

OBS Studio can record a screen, microphone, and other sources for a video tutorial. It is useful when the explanation depends on watching a process, such as graphing an equation or navigating a resource.

How to use it

Build one simple scene, record a short test, and check both microphone and screen legibility. Close unrelated windows before recording the actual walkthrough.

Keep in mind

Setup is more involved than a one-click recorder. Check audio levels and avoid capturing student names or unrelated private information on screen.

Explore OBS Studio ↗Official source: obsproject.com ↗

Creating lessons, diagrams & video

PICK 38 / Editing a short teaching video

38. OpenShot ↗

OpenShot — editorial illustration of Edited video files; not a product screenshot
OpenShot — editorial SVG illustration, not an actual product screenshot.

OpenShot provides a desktop video editing workflow for arranging clips and adding simple titles. Pair it with a recorder when a lesson needs a clearer sequence or shorter explanation.

How to use it

Import a recording, remove pauses and repeated steps, and add a brief title that states the learning objective. Watch the exported file before sharing it.

Keep in mind

Rendering takes time and hardware resources. Keep the original recording, and check that text and narration stay synchronized after export.

Explore OpenShot ↗Official source: www.openshot.org ↗

Creating lessons, diagrams & video

PICK 39 / Quick explanatory sketches

39. Excalidraw ↗

Excalidraw — editorial illustration of Sketch diagrams and whiteboards; not a product screenshot
Excalidraw — editorial SVG illustration, not an actual product screenshot.

Excalidraw provides a drawing canvas for quick diagrams. It works well for a semantic map, a process explanation, or a visual comparison that benefits from a deliberately simple sketch.

How to use it

Place the main concept in the center, connect related ideas with labeled arrows, and export or save the drawing with a brief written explanation.

Keep in mind

The free editor and Excalidraw Plus have different persistence and collaboration features. Save an explicit copy of important work.

Explore Excalidraw ↗Official source: github.com ↗

Creating lessons, diagrams & video

PICK 40 / Structured diagrams and flowcharts

40. draw.io ↗

draw.io — editorial illustration of Flowcharts and concept maps; not a product screenshot
draw.io — editorial SVG illustration, not an actual product screenshot.

draw.io is useful when you need a tidy diagram with connectors and consistent shapes. Choose it for a decision tree, process, or classification activity that needs clearer structure than a freehand sketch.

How to use it

Start with a blank diagram, assign one meaning to each shape, and label every branch. Save the editable file before exporting the diagram for a lesson.

Keep in mind

Storage and collaboration depend on the mode or integration selected. The editor does not verify whether your diagram’s logic or subject content is correct.

Explore draw.io ↗Official source: www.drawio.com ↗

Research, books & reusable media

PICK 41 / Organizing sources and citations

41. Zotero ↗

Zotero — editorial illustration of Reference library and citations; not a product screenshot
Zotero — editorial SVG illustration, not an actual product screenshot.

Zotero helps collect, organize, annotate, and cite sources. It is a useful companion to a free resource collection because a saved link becomes easier to find when it has a title, author, topic, and note.

How to use it

Create a collection for one project, save a source, and check the imported metadata. Add a note explaining what the source supports before inserting a citation.

Keep in mind

Extra file-sync storage can cost money. Automatically imported citation details still need checking, especially dates, author names, and document types.

Explore Zotero ↗Official source: www.zotero.org ↗

Research, books & reusable media

PICK 42 / Discovering open-access journals

42. Directory of Open Access Journals ↗

Directory of Open Access Journals — editorial illustration of Journals and article records; not a product screenshot
Directory of Open Access Journals — editorial SVG illustration, not an actual product screenshot.

DOAJ helps readers discover peer-reviewed open-access journals. It is a useful starting point when a lesson or research project needs scholarly material that learners can access without an institutional subscription.

How to use it

Search a topic, inspect the journal and article record, and open the publisher’s page. Check the methods and publication date before using a claim.

Keep in mind

Directory inclusion does not make every claim in every article correct. Full-text formats and reuse licenses depend on the publisher and article.

Explore Directory of Open Access Journals ↗Official source: doaj.org ↗

Research, books & reusable media

PICK 43 / Education literature discovery

43. ERIC ↗

ERIC — editorial illustration of Research records and documents; not a product screenshot
ERIC — editorial SVG illustration, not an actual product screenshot.

ERIC is an education research database that helps locate studies and reports. Use it when you want background evidence for a teaching approach rather than relying on product marketing alone.

How to use it

Search a narrowly defined question, use the available peer-review or full-text filters, and read the abstract before opening the document. Record the population studied.

Keep in mind

Not every indexed record includes free full text, and an abstract is not enough to judge an intervention. Distinguish research findings from recommendations.

Explore ERIC ↗Official source: eric.ed.gov ↗

Research, books & reusable media

PICK 44 / Finding open research versions

44. CORE ↗

CORE — editorial illustration of Research records and full text; not a product screenshot
CORE — editorial SVG illustration, not an actual product screenshot.

CORE aggregates research from repositories and journals. It is useful when you need to locate an accessible version of a paper or broaden a search beyond one publisher’s website.

How to use it

Search the paper title or a precise topic, open the repository record, and confirm the author, year, and version. Save the source alongside your notes.

Keep in mind

An available manuscript can differ from the final published version. Public discovery and developer or bulk-data services have different terms.

Explore CORE ↗Official source: core.ac.uk ↗

Research, books & reusable media

PICK 45 / Classic books for offline reading

45. Project Gutenberg ↗

Project Gutenberg — editorial illustration of EPUB, HTML and other formats; not a product screenshot
Project Gutenberg — editorial SVG illustration, not an actual product screenshot.

Project Gutenberg provides free ebooks with a focus on older works whose U.S. copyright has expired. It is useful for sustained reading, comparison across editions, or building an offline collection of classic texts.

How to use it

Find a title, check its language and edition, and choose a format your device supports. Set a short reading goal and record unfamiliar vocabulary in context.

Keep in mind

Copyright status varies by country, and older texts may contain dated language or ideas. Preview the edition and its suitability for the learners.

Explore Project Gutenberg ↗Official source: www.gutenberg.org ↗

Research, books & reusable media

PICK 46 / Primary-source learning

46. Library of Congress Education ↗

Library of Congress Education — editorial illustration of Source sets and teaching guides; not a product screenshot
Library of Congress Education — editorial SVG illustration, not an actual product screenshot.

The Library of Congress offers classroom resources built around primary sources. It helps students practice asking who created a document, for whom, and in what context instead of treating every source as a neutral fact.

How to use it

Choose a source set, have learners separate observation from inference, and compare two documents. Ask what additional evidence would help resolve a disagreement.

Keep in mind

Item rights and contextual information differ across collections. Keep the original credit and link, and avoid presenting one artifact as a complete account of an event.

Explore Library of Congress Education ↗Official source: www.loc.gov ↗

Research, books & reusable media

PICK 47 / Finding reusable visual media

47. Wikimedia Commons ↗

Wikimedia Commons — editorial illustration of Images, diagrams and audio; not a product screenshot
Wikimedia Commons — editorial SVG illustration, not an actual product screenshot.

Wikimedia Commons hosts media with public-domain or free-license information on individual file pages. It is useful for finding a diagram or photograph while keeping the creator and reuse details close to the asset.

How to use it

Open the file page rather than saving a search thumbnail. Record the creator, source, license, and any attribution text before adding the media to your lesson.

Keep in mind

A free license may require attribution or share-alike handling. Verify the individual file and do not assume that every image found elsewhere on Wikipedia has identical terms.

Explore Wikimedia Commons ↗Official source: commons.wikimedia.org ↗

Research, books & reusable media

PICK 48 / Searching openly licensed media

48. Openverse ↗

Openverse — editorial illustration of Image and audio discovery; not a product screenshot
Openverse — editorial SVG illustration, not an actual product screenshot.

Openverse searches openly licensed and public-domain images and audio across sources. It is useful for widening a media search when one collection does not contain the subject or style you need.

How to use it

Search a concrete subject, inspect the result’s license, and follow the source link. Keep the attribution with the downloaded asset so it survives later editing.

Keep in mind

Openverse cautions that license metadata should be verified at the original source. A search filter is not a guarantee that all rights or permissions have been resolved.

Explore Openverse ↗Official source: docs.openverse.org ↗

How to choose free comprehension worksheets by learning need

For reading comprehension worksheets for 1st graders, inspect whether learners can decode the text independently or need an adult to read it aloud. K5 Learning and K12Reader provide printable practice; ReadWorks offers a different route with passages and text-dependent questions. A listening task can build comprehension, but it does not measure independent reading.

For reading comprehension in grade 4 or grade 7, begin with the skill, not just the grade label. Main idea, inference, vocabulary in context, and comparison place different demands on a reader. Preview one passage and ask for a sentence of evidence before assigning a larger set. If you are searching for reading comprehension for class 3, confirm that the provider’s grade system and curriculum match your learners.

When comparing reading programs for struggling readers, identify the actual obstacle first: recognizing words, reading fluently, understanding vocabulary, or connecting ideas. A comprehension platform can support practice, but a worksheet library alone is not a complete reading curriculum. Use student work and teacher judgment to decide the next step rather than treating an automated score as a diagnosis.

From printable coordinate plane grids to an explained graph

Start with a coordinate plane printable when the goal is understanding axes and ordered pairs. Mark the origin, label x and y, and keep equal spacing within each axis. A blank Cartesian coordinate grid is useful only when the task tells learners what the numbers and units mean.

For a first graphing example, use the points (0, 1), (1, 3), and (2, 5). Plot them on paper, predict the next point, then enter y = 2x + 1 in Desmos. This lets learners connect a table, a rule, and a graph. For virtual graph paper, choose a digital canvas such as GeoGebra or Polypad when the activity benefits from moving objects.

For categories such as books read by each class, choose a bar chart instead of connecting points with a line. NCES Create a Graph is an approachable starting point; Datawrapper suits a more polished report. Include the data source and explain what the chart cannot establish. A tall bar shows a larger value, not necessarily a cause.

Choosing the best tools for online teaching without tool overload

The best tools for online teaching solve different jobs: a source for content, an activity for practice, and a way to explain or collect work. Begin with one of each. For example, combine an OpenStax section, a PhET activity, and an OBS recording. Add another platform only when it removes a specific obstacle.

When comparing ed-tech tools for teachers, check the full route from preparation to student access. Can a learner open the material on the available device? Does the activity require an account? Is the free plan sufficient for the class? Can you keep an offline copy or provide an equivalent printable task?

Before the first lesson, try the student-facing view with non-sensitive sample content. Open the exported file on a second device if possible. Keep the original resource link, an accessible text explanation, and a fallback activity in the same lesson folder. This small rehearsal is often more useful than adding another tool to the list.

Is it free to access, free to download, or free to adapt?

These are separate questions. A free website can prohibit republishing its worksheets. An open textbook can permit adaptation with attribution and other conditions. Open-source software can be free to install while optional hosting or storage costs money. Use the access column as a starting point and inspect the individual resource’s terms before sharing an adapted version.

Keep a simple source record: title, creator, original URL, license or permission, access date, and a note of your changes. For an image, retain the file-page link as well as the image itself. Openverse and Wikimedia Commons are discovery tools; the original item page is where the reuse details need to be checked.

For a practical reuse check, imagine adding a StoryWeaver illustration to a vocabulary activity. Record its creators and license, identify which format you are using, and preserve the required credit. Do not assume the permission for a storybook also applies to a separately licensed readalong video.

Frequently asked questions

What is a free resource?

A free resource is material or a tool available without payment for a defined use. It can be a worksheet, textbook, simulation, research record, or software application. The definition does not promise unlimited access, no account requirement, or permission to redistribute the material.

Which free resources work without a student account?

Public reading and downloads from Project Gutenberg, public OpenStax textbook pages, Incompetech graph-paper generators, and basic Desmos calculator use are useful starting points. Saving progress, joining a class, or sharing work online may introduce an account requirement even when public access does not.

Where can I find free resources for teachers and students?

Start with the task: K5 Learning or ReadWorks for reading practice, Open Up Resources for curriculum, the Math Learning Center for visual math models, PhET for simulations, and the Library of Congress for primary-source lessons. The directory above separates these uses so you can compare the relevant options.

Are all 48 resources completely free?

Each has a free resource, free core product, or free eligible education option. Some sell print editions, premium features, storage, or institutional services. ReadTheory has a limited Basic plan, and Canva Education and Adobe Express education access depend on eligibility. Check the access and limitation notes for the option you choose.

Can these resources replace a complete curriculum?

Some entries provide coherent curricula or textbooks, while others support one lesson or skill. A collection of worksheets, simulations, and editing tools does not automatically form a curriculum. Check the sequence, learning objectives, assessment approach, and fit with your local requirements.

THE TAKEAWAY

Start with the job you need to do.

Choose one task and one resource first. Preview it, check the free access and reuse terms, and try a small activity before bringing it into a full lesson. A short, maintained collection with clear sources is more useful than dozens of bookmarks you have never opened.

About this guide

This is an editorial shortlist based on published product information, not a hands-on benchmark. Features and availability may change. Reference: OER Commons: the difference between free and open resources ↗