🎓 GENERAL & MULTIDISCIPLINARY (1–20)
Khan Academy – Academic subjects from K–12 to early college.
Coursera – Free courses from top universities.
edX – Free access to Harvard, MIT, and more.
FutureLearn – Short courses on a wide range of topics.
Alison – Free diplomas and certificates.
Saylor Academy – Full-length college courses.
Academic Earth – Courses from Ivy League schools.
OpenLearn – Free university-level material from the UK.
MIT OpenCourseWare – Real MIT courses, completely free.
Open Culture – Free courses, books, and more.
Stanford Online – Courses in tech, health, and policy.
Harvard Online Learning – Prestigious free courses.
Oxford Home Study – Business and management topics.
Canvas Network – Open online courses for lifelong learners.
TED-Ed – Animated lessons and thought-provoking content.
YouTube EDU – Curated educational videos.
CrashCourse – Engaging video series on many subjects.
PBS LearningMedia – Classroom-ready resources.
CK-12 – Free STEM textbooks and simulations.
Learn Anything – Mind-map-style knowledge exploration.
🧮 MATH, SCIENCE & ENGINEERING (21–40)
Brilliant – Problem-solving through interactive lessons.
Paul’s Online Math Notes – Great for calculus.
Desmos – Graphing calculator and math tools.
Wolfram Alpha – Powerful computational engine.
PhET – Interactive science simulations.
Physics Classroom – Science made simple.
BioMan Biology – Educational games for biology.
NASA STEM – Space-themed educational tools.
LibreTexts – Open-source textbooks in science.
ChemCollective – Virtual chemistry labs.
HyperPhysics – Explore physics visually.
HowStuffWorks – Easy breakdowns of how things work.
Scitable – Genetics and biology learning.
Math is Fun – Friendly math tutorials.
PlanetMath – Community-created math resource.
Zooniverse – Learn by helping scientists.
National Geographic Education – Earth and geography.
Engineering Toolbox – Useful for engineers.
LearnChemE – Chemical engineering video tutorials.
GeoGebra – Math tools and apps.
👨💻 CODING & COMPUTER SCIENCE (41–60)
freeCodeCamp – Full coding curriculum.
The Odin Project – Web development roadmap.
W3Schools – Easy reference for web development.
Codecademy (Free tier) – Interactive coding.
Kaggle Learn – Data science tutorials.
CS50 by Harvard – Legendary intro to programming.
MIT CS OpenCourseWare – Deep technical content.
HackerRank – Competitive programming challenges.
LeetCode (Free tier) – Coding interview prep.
GeeksforGeeks – CS concepts explained.
Exercism – Hands-on coding with mentorship.
Codewars – Fun coding katas.
GitHub Learning Lab – Learn Git and coding.
Mozilla Developer Network – Front-end dev resource.
Scratch (MIT) – Beginner-friendly coding.
Code.org – K–12 coding education.
Sololearn – Mobile coding practice.
Turing College Blog – Tech tutorials and roadmaps.
CS50 Sandbox – Online coding environment.
Frontend Mentor (Free challenges) – HTML/CSS project practice.
📚 SCHOOL & EXAM PREP (61–80)
BBC Bitesize – School subjects simplified.
Quizlet – Flashcards and study games.
Toppr – Indian syllabus-based learning.
Unacademy – Free live classes.
Vedantu (Free tier) – Interactive Indian curriculum.
Embibe – AI-powered test analysis.
NCERT – Indian textbook PDFs.
BYJU’S Free Classes – Conceptual video lessons.
LearnCBSE – Solved exercises and papers.
Socratic by Google – Get help by snapping a photo.
Meritnation (Free tier) – K–12 subjects.
SparkNotes – Literature and summaries.
StudyLib – Shared notes and flashcards.
Chegg Study (Free trials) – Textbook solutions.
Studocu (Free plans) – Notes from top students.
Shiksha – Indian college info and prep tips.
Gradeup (now BYJU’S Exam Prep) – Competitive exam material.
JEE Advanced Prep by NTA – Official resources.
MIT Blossoms – Interactive STEM lessons.
OpenStax – College textbooks, free.
💼 CAREERS, FINANCE & LIFE SKILLS (81–100)
Investopedia – Finance & investing education.
MyMoney.gov – U.S. government financial literacy.
Coursera Career Academy – Learn to land jobs.
The Forage – Virtual work experiences.
Smartly MBA (Free tier) – Business and leadership.
LinkedIn Learning (via library) – Business skills.
Entrepreneurship.org – Start-up learning.
SBA Learning Center – Small business training.
FutureLearn: Financial Planning – Money skills.
Google Digital Garage – Career and marketing.
Microsoft Learn – Tech and tools tutorials.
Harvard ManageMentor (samples) – Leadership insights.
TED Talks: Life and Work – Inspiration and skill-building.
Alison – Workplace Skills – Resumes, interviews, etiquette.
FEE.org – Economics and personal freedom.
LearnVest (Archives) – Finance articles.
Skillshare (Free classes) – Freelance and creative skills.
Lifehacker – Productivity and self-help hacks.
MindTools – Time and project management.
Trello Templates – Organize your learning.
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