Learning & Knowledge
School subjects34 websites
- 3Blue1BrownVisual explanations of mathematics and related concepts.
- ABCyaEducational games organized by grade level and subject.
- Bedtime MathEveryday mathematics activities designed for families and children.
- BetterExplainedIntuitive explanations of mathematical concepts.
- BrilliantInteractive problem-solving courses in math, science, and computer science.
- Chemistry LibreTextsOpen chemistry textbooks, course materials, and reference content.
- ESA KidsEuropean Space Agency educational space content for children.
- ExploratoriumHands-on science activities, experiments, exhibits, and learning resources.
- Free Kids BooksFree children's books and educational reading materials.
- Generation GeniusScience and math learning videos and classroom resources; free access may be limited.
- HHMI BioInteractiveFree biology and life-science educational resources and interactives.
- HyperPhysicsA concept-map-based reference covering major topics in physics.
- International Children's Digital LibraryDigital collection of children's books from around the world.
- Learn.GeneticsInteractive genetics and bioscience learning resources from the University of Utah.
- LEGO EducationLesson plans and hands-on STEAM learning resources from LEGO Education.
- Math AcademyAdaptive mathematics learning platform.
- Math PlaygroundMath games, logic activities, and problem-solving exercises.
- Mystery ScienceScience lessons and activities for elementary learners and teachers.
- NASA Climate KidsChild-friendly climate, weather, earth science, and environment resources.
- NASA Space PlaceNASA space and earth-science activities, games, and explanations for children.
- Neuroscientifically ChallengedAccessible explanations and videos covering neuroscience fundamentals.
- NRICHMathematics problems and enrichment activities from the University of Cambridge.
- Oxford OwlReading, mathematics, and home-learning resources for children and parents.
- Paul's Online Math NotesFree algebra, calculus, and differential equations notes and tutorials.
- PhET Interactive SimulationsInteractive simulations for physics, chemistry, mathematics, earth science, and biology.
- Reading BearFree phonics and early-reading learning program.
- Science BuddiesScience-fair projects, experiments, STEM activities, and project guides.
- SplashLearnGrade-based mathematics and reading practice with free and paid features.
- StarfallEarly-learning activities focused on reading, phonics, mathematics, and language.
- Storyline OnlineChildren's books read aloud by actors and performers.
- StoryWeaverOpen multilingual digital library of children's stories.
- The Feynman Lectures on PhysicsOnline edition of Richard Feynman's classic physics lectures.
- The Physics ClassroomTutorials, interactives, and resources for learning physics.
- Unite for LiteracyIllustrated digital books with audio narration in multiple languages.
General knowledge25 websites
- AeonLong-form essays on philosophy, science, psychology, society, and culture.
- Art for Kids HubStep-by-step drawing and art lessons for children and families.
- Big ThinkIdeas, interviews, and educational content covering science, society, and culture.
- Britannica KidsChild-focused encyclopedia and reference material.
- Crash CourseFast-paced educational videos spanning science, history, humanities, and more.
- Data CommonsExplore interconnected public datasets about places, populations, economics, and more.
- DK Find Out!Visual educational reference covering science, history, nature, and general knowledge.
- DuckstersStudent-friendly explanations and reference material across school subjects.
- Gapminder ToolsExplore global development data through interactive visualizations.
- Gus on the GoLanguage-learning resources and apps designed for younger children.
- Information Is BeautifulExplore data visualizations that make complex topics easier to understand.
- Internet Live StatsExplore estimates of internet activity and usage through live-style counters.
- Learn AnythingExplore visual learning paths.
- NASA YouTubeNASA videos, launches, space coverage, educational content, and archives.
- National Geographic KidsNature, science, geography, animals, and exploration content for children.
- NautilusLong-form stories exploring science, philosophy, and culture.
- Quanta MagazineIn-depth journalism on mathematics, physics, biology, and computer science.
- ScienceDailyBrowse science news and research summaries across many disciplines.
- SketchRxDrawing practice and visual-art exercises.
- Tate KidsArt activities, games, and artist resources for children.
- TED TalksTalks and explanations from researchers, experts, creators, and practitioners.
- The PuddingExplore visual essays and stories told through data and interactive graphics.
- WonderopolisDaily curiosity-driven questions and explanations for children and families.
- World Population ReviewExplore population statistics and country-level data.
- WorldometerExplore continuously updated global statistics and counters.
Courses & tutorials43 websites
- Khan AcademyFree lessons and exercises in mathematics, science, computing, economics, and more.
- MIT OpenCourseWareFree course materials from thousands of MIT courses.
- OpenStaxAccess free, peer-reviewed textbooks and educational resources.
- CourseraUniversity and industry courses, with some content available to access without a paid certificate.
- FanoutLearning paths for AI research, system design and machine-learning mathematics.
- AlisonOnline courses across professional, academic, and vocational subjects.
- Chrome Music LabInteractive experiments for exploring music, rhythm, sound, and composition.
- Class CentralSearch and compare online courses from universities and learning platforms.
- DisasterReadyFree humanitarian and development training for aid professionals.
- DuolingoBite-sized, game-like language lessons covering reading, writing, listening and speaking, on the web and in iOS and Android apps.
- edXOnline courses and programs from universities and organizations around the world.
- FAO eLearning AcademyFood, agriculture, nutrition, and rural-development learning resources.
- FutureLearnOnline short courses and programs across a wide range of subjects.
- Google AnalyticsGoogle Analytics platform and related learning ecosystem.
- Google SkillshopOfficial Google product training and certification resources.
- Great LearningProfessional and technology learning programs, including free short courses.
- HubSpot AcademyMarketing, sales, service, and CRM training with certifications.
- iFixitRepair guides, teardowns, troubleshooting, and parts information for electronics and devices.
- ILO eLearningInternational Labour Organization online learning resources.
- InstructablesCommunity archive of DIY projects, builds, repairs, crafts, and how-to guides.
- LibreTextsOpen-access textbooks and learning materials across academic disciplines.
- LinkedIn LearningProfessional skills courses; access may be available through participating libraries or institutions.
- MERLOTCurated collection of online teaching and learning materials.
- Meta BlueprintMeta learning resources for advertising, marketing, and business tools.
- MindLusterOnline learning platform offering free courses across technology, business, creative, and professional subjects.
- MIT Open LearningMIT's open learning initiatives and digital education resources.
- MusicTheory.netFree music-theory lessons, exercises, and reference tools.
- OER CommonsDigital library of open educational resources.
- Open CultureDiscover free courses, lectures, books, films, and educational resources.
- Open MichiganOpen educational resources and course materials from the University of Michigan.
- Open Yale CoursesFree recordings and materials from selected Yale courses.
- OpenLearnFree courses and learning materials from The Open University.
- OpenWHOWHO learning platform for health emergencies and public-health knowledge.
- Saylor AcademyFree and open online courses across university-level subjects.
- Semrush AcademySEO, content, advertising, and digital-marketing courses.
- Simplilearn SkillUpFree introductory courses across technology and business topics.
- Stanford OnlineStanford online courses and learning resources.
- TikTok AcademyTikTok learning platform for advertising and marketing skills.
- TU Delft OpenCourseWareOpen engineering, science, and technology course materials from TU Delft.
- UC Berkeley OnlineOnline learning and educational resources from UC Berkeley.
- UN CC:e-LearnUnited Nations climate-change learning platform.
- UNHCR LearnUNHCR learning and training resources related to refugees and humanitarian work.
- UNICEF AgoraUNICEF learning platform for staff, partners, and development practitioners.
Coding & technology learning55 websites
- CS50 at HarvardHarvard's introductory computer science course and related CS50 materials.
- The Odin ProjectFree open-source full-stack web-development curriculum.
- W3SchoolsProgramming tutorials, references and interactive examples.
- Anthropic LearningCourses and learning resources from Anthropic.
- AWS Skill BuilderAWS training resources for cloud, AI, machine learning, and related technologies.
- Blockly GamesEducational games that introduce programming concepts through block-based coding.
- Cisco Networking AcademyNetworking, cybersecurity, programming, and IT training from Cisco.
- CoddyInteractive programming courses with coding exercises.
- Code.orgFree computer-science and coding lessons for students and educators.
- CodeCombatLearn programming, including Python, by coding your way through game levels.
- CodepipLearn HTML, CSS, JavaScript, and web-development concepts through coding games.
- CodinGamePractice programming across many languages through puzzles and coding challenges.
- CybraryCybersecurity and IT training platform with free and paid learning options.
- DeepLearning.AICourses and learning resources covering AI, machine learning, generative AI, and deep learning.
- DevOps GamesPractice DevOps concepts through game-like challenges.
- DistillInteractive and visual explanations of machine-learning research.
- Dive into Deep LearningInteractive deep-learning textbook with code and mathematical explanations.
- ExercismFree programming practice and mentoring across many programming languages.
- fast.aiPractical deep-learning courses and resources.
- Fortinet Training InstituteCybersecurity training and certification preparation from Fortinet.
- freeCodeCampFree coding curriculum with project-based developer certifications.
- GenAI AgentsLearn agent patterns including tool use, planning, RAG agents, memory, multi-agent systems, and workflows.
- Google AI LearningAI learning resources and courses from Google.
- Google Cloud Skills BoostGoogle Cloud hands-on learning paths, labs, and skill badges.
- Google for Developers LearnOfficial Google developer tutorials, pathways, and technical learning resources.
- HackerRankCoding practice, technical assessments, and skills verification.
- Hands-On Large Language ModelsLearn LLMs by building: embeddings, transformers, RAG, fine-tuning, semantic search, and LLM applications.
- Hour of CodeShort introductory coding activities for learners of different ages.
- Hugging Face LearnFree courses and learning materials covering the Hugging Face ecosystem.
- IBM SkillsBuildFree learning resources covering AI, technology, professional skills, and career development.
- K8s GamesLearn and practice Kubernetes through interactive challenges.
- Kaggle LearnShort hands-on courses for data science and machine learning.
- Learn X in Y MinutesQuick guides to programming languages and concepts.
- LLM CourseRoadmap covering LLM architectures, fine-tuning, quantization, RAG, agents, and deployment.
- Made With MLLearn production ML: data, modeling, evaluation, deployment, MLOps, and production systems.
- Meta AI ResourcesAI research, learning, and technical resources from Meta.
- Microsoft LearnFree training paths and modules covering AI, Azure, development, data, and Microsoft technologies.
- Microsoft MakeCodeBlock- and text-based coding environment for learning programming with interactive projects.
- Nand2TetrisLearn computing systems by building a computer from fundamental logic components upward.
- Oh My Git!Learn Git through an interactive game using real Git commands.
- OpenAI AcademyLearning resources, events, and educational content from OpenAI.
- openSAPOpen online courses and learning resources from SAP.
- OverAPIDeveloper cheat sheets for programming languages and technologies.
- OverTheWireLearn Linux, command-line, networking, and security through wargames.
- picoCTFLearn cybersecurity through capture-the-flag challenges and puzzles.
- ProjectLearnLearn programming through guided projects and tutorials.
- Prompt Engineering GuideResources covering prompting techniques, RAG, agents, LLM research, capabilities, and optimization.
- roadmap.shCommunity-created learning roadmaps for developers and technical roles.
- ScratchLearn programming fundamentals through visual block-based coding and projects.
- SololearnMobile-friendly interactive coding lessons across multiple languages.
- Teach Yourself Computer ScienceA self-study curriculum covering core computer science subjects.
- TryHackMeHands-on cybersecurity learning through guided labs and challenges.
- TypingClubTyping lessons and keyboard-skills practice.
- Web Dev for BeginnersMicrosoft's project-based introductory web-development curriculum.
- web.dev LearnModern web-development courses and guides from Google.
Books, libraries & research39 websites
- Project GutenbergAccess tens of thousands of free public-domain ebooks.
- Anna's ArchiveSearch a large index of books and academic materials.
- arXivOpen repository of research preprints across science, mathematics, computing, and related fields.
- Biodiversity Heritage LibraryExplore digitized biodiversity literature and historic natural-history books.
- Connected PapersVisually explore relationships between academic papers.
- ConsensusSearch scientific research and explore evidence-backed answers.
- Cooper Hewitt CollectionExplore the Cooper Hewitt Smithsonian Design Museum collection online.
- David Rumsey Map CollectionExplore a large digitized collection of historical maps.
- Digital Public Library of AmericaSearch digital collections from libraries, archives, and museums across the United States.
- DigitalNZSearch New Zealand digital heritage and cultural collections.
- DOAJSearch the Directory of Open Access Journals.
- ElicitAI-assisted research and literature review.
- EuropeanaExplore digitized European cultural heritage.
- Florence Griswold MuseumExplore American art, exhibitions, and museum collections.
- Google Arts & CultureExplore museums, artworks, cultural sites, stories, and virtual exhibitions.
- Internet ArchiveExplore archived websites, books, media, and other digital collections.
- Internet Encyclopedia of PhilosophyPeer-reviewed reference articles on philosophers and philosophical topics.
- Library GenesisSearch for books and academic materials.
- Library of CongressExplore digitized books, photographs, recordings, maps, manuscripts, and historical collections.
- LibriVoxVolunteer-read audiobooks of public-domain works.
- Loyal BooksFree public-domain audiobooks and ebooks.
- Open LibraryExplore a digital library and borrow available books online.
- Our World in DataExplore research and data on global health, population, energy, poverty, technology, and more.
- PDF DriveSearch for downloadable PDF books and documents.
- PhilosophizeIntroductory philosophy resources.
- RijksmuseumExplore the Rijksmuseum's art collection and digital resources.
- Sci-HubSearch for research papers.
- SciSpaceFind, understand, and work with academic research papers.
- Semantic ScholarAcademic search engine for scientific literature.
- Smithsonian Open AccessExplore millions of Smithsonian digital items and open-access assets.
- Stanford Encyclopedia of PhilosophyScholarly reference articles covering philosophy and related fields.
- The Metropolitan Museum of ArtExplore the Met's collection, exhibitions, research, and open-access artworks.
- The Public Domain ReviewExplore curious and remarkable works from the history of art, literature, and ideas.
- TroveExplore Australian newspapers, books, images, archives, and cultural collections.
- UbuWebAvant-garde and experimental art, film, sound, and writing archive.
- UnpaywallFind freely accessible versions of research papers.
- WikiArtBrowse a large online collection of visual art organized by artist, style, and movement.
- Wikipedia Random ArticleJump to a random Wikipedia article.
- World Bank Open DataExplore global development indicators and World Bank datasets.
Study tools5 websites
- GizmoTurn study materials into flashcards and AI quizzes.
- DesmosInteractive graphing and mathematics tools.
- GeoGebraInteractive tools for geometry, algebra, calculus, statistics, and more.
- Wolfram|AlphaComputational engine for mathematics, science, data, and more.
- YouLearnAI learning tool for summarizing and studying videos and other content.