Video course
MITIntroductoryIntroduction to Solid-State Chemistry
Sadoway's legendary chemistry of real materials — batteries included.
31h47 lec
The open university catalog
Learn anything. Pay nothing.
Stream or download complete courses from MIT, Stanford, Harvard, Yale, Berkeley, and the IITs — plus full textbooks you read right here. Legally free, one click, forever.
- verified courses & books
- 185
- hours of material
- 5500+
- universities & presses
- 9
- paywalls, ads, accounts
- 0
Start with the classics
The courses the internet fell in love with — Strang's linear algebra, Malan's CS50, Ng's machine learning. One click to lecture one.
The catalog
185 of 185 courses · every one free, verified, and complete
MITIntroductoryVideo course
YaleIntroductoryFinancial Markets
How markets actually work — taught by a Nobel laureate who predicted two crashes.
31h26 lec
Video course
HarvardIntroductoryCS50 — Introduction to Computer Science
The most popular university course in the world — now free to everyone.
30h12 lec
Video course
BerkeleyIntroductoryStructure and Interpretation of Computer Programs
The legendary CS61A, taught by the man who wrote the book.
30h30 lec
Video course
NPTELIntermediateDeep Learning
IIT's complete deep learning course — from perceptrons to seq2seq.
30h60 lec
Video course
MITIntermediateLinear Algebra
The most-watched mathematics course ever recorded.
28h34 lec
Video course
StanfordIntroductoryProgramming Methodology
The most beloved intro CS course ever recorded.
25h28 lec
Video course
StanfordAdvancedNatural Language Processing with Deep Learning
Word vectors to transformers — the definitive NLP course.
25h19 lec
Video course
YaleIntermediateGame Theory
Strategic thinking, taught with wit and midterms played as games.
24h24 lec
Video course
MITIntermediateIntroduction to Algorithms
Sorting, searching, hashing — the engine room of computer science.
22h27 lec
Video course
MITIntermediateSignals and Systems
The legendary Oppenheim lectures — Fourier, sampling, and everything after.
22h26 lec
Video course
MITIntroductoryPrinciples of Microeconomics
Supply, demand, and the logic of markets — from MIT's Economics department.
20h24 lec
Video course
StanfordAdvancedMachine Learning
The course that launched a thousand careers — taught by Andrew Ng himself.
18h20 lec
Video course
StanfordAdvancedTransformers United
A seminar where the people who built transformers explain them.
15h20 lec
Video course
HarvardIntroductoryJustice: What's the Right Thing to Do?
Harvard's legendary ethics course — the first one ever put on the open web.
13h19 lec
Video course
MITIntroductoryIntroduction to Computer Science and Programming in Python
The gentlest possible on-ramp into computer science.
10h12 lec
Book · PDF & web
OpenStaxIntroductoryAnatomy and Physiology 2e
The complete A&P textbook — every system of the human body, from cells to reproduction, free and peer-reviewed.
122h read28 ch
Book · PDF & web
Open TextbooksAdvancedDive into Deep Learning
The interactive deep learning textbook — every model runnable, every figure generated by code you can change.
120h read167 ch
Book · PDF & web
OpenStaxIntroductoryBiology 2e
The complete majors-biology textbook — from the chemistry of life to ecology — free, peer-reviewed, and used by millions.
98h read47 ch
Book · PDF & web
OpenStaxIntroductoryPrinciples of Finance 2e
The complete corporate finance textbook — time value of money, valuation, risk, and capital budgeting.
78h read20 ch
Book · PDF & web
OpenStaxIntroductoryPrinciples of Economics 3e
The complete two-semester economics sequence — micro and macro together — from the standard open textbook.
75h read34 ch
Book · PDF & web
StanfordAdvancedConvex Optimization
The canonical graduate text on convex optimization — from Stanford's Boyd & Vandenberghe, free to download.
70h read22 ch
Book · PDF & web
OpenStaxIntroductoryAstronomy 2e
The complete introduction to modern astronomy — from the night sky to cosmology — free from OpenStax.
61h read30 ch
Book · PDF & web
StanfordAdvancedSpeech and Language Processing
Jurafsky & Martin's definitive NLP textbook, rewritten for the era of large language models — free in draft from Stanford.
60h read28 ch
Video course
NPTELIntermediateFluid Mechanics
IIT Kharagpur's flagship — among the most-watched NPTEL courses ever.
56h58 lec
Video course
NPTELIntermediateElectrical Machines I
Transformers and DC machines — the first half of the power world.
54h95 lec
Book · PDF & web
OpenStaxIntroductoryU.S. History
American history from the first nations to the present — a complete, peer-reviewed open textbook.
54h read32 ch
Video course
NPTELIntermediateSoil Mechanics and Foundation Engineering
Every building stands on soil — the IITs' geotechnical engineering course.
51h57 lec
Book · PDF & web
OpenStaxIntroductoryIntroductory Business Statistics 2e
Statistics for business students — sampling, confidence intervals, regression, and forecasting, with business cases.
50h read13 ch
Book · PDF & web
OpenStaxIntroductoryChemistry 2e
Two semesters of general chemistry — atoms to thermochemistry to electrochemistry — free and peer-reviewed.
47h read21 ch
Book · PDF & web
OpenStaxIntermediateUniversity Physics Volume 2
University physics, volume 2 — heat, electricity, magnetism, and circuits, the calculus-based second semester.
47h read16 ch
Video course
StanfordAdvancedConvex Optimization I & II
The optimization course that industry keeps quietly stealing.
46h37 lec
Book · PDF & web
OpenStaxIntroductoryEntrepreneurship
The complete entrepreneurship textbook — from opportunity recognition to funding, growth, and exit.
45h read15 ch
Video course
NPTELAdvancedReal Analysis
Why calculus is true — the IITs' rigorous construction of the real numbers.
45h52 lec
Book · PDF & web
OpenStaxIntermediateMicrobiology
From microbial cell structure to epidemiology and immunology — the complete open microbiology text.
44h read26 ch
Book · PDF & web
OpenStaxIntroductoryIntroduction to Business 2e
The whole business landscape in one book — economics, marketing, finance, and entrepreneurship — free and current.
44h read17 ch
Video course
MITAdvancedComputational Science and Engineering I
Strang beyond linear algebra — the applied math behind simulation.
42h50 lec
Book · PDF & web
MITIntroductoryCalculus
Gilbert Strang's complete calculus textbook — the companion to his famous 18.01 lectures, free from MIT chapter by chapter.
42h read17 ch
Video course
NPTELIntermediateDatabase Management System
The complete database course — ER diagrams to transactions.
41h81 lec
Video course
MITAdvancedDesign and Analysis of Algorithms
Where 6.006 ends — amortization, randomness, and NP-completeness.
40h34 lec
Video course
NPTELIntroductoryStrength of Materials
Why structures stand — stress, bending, and the margin of safety.
40h40 lec
Book · PDF & web
Open TextbooksIntermediateMathematics for Machine Learning
The mathematical launchpad between undergraduate math and machine learning — linear algebra, calculus, probability, and optimization in one book.
40h read20 ch
Book · PDF & web
OpenStaxIntroductoryIntroduction to Sociology 3e
Sociology's core lens — from the sociological imagination to inequality, deviance, and social change — in one open book.
40h read21 ch
Book · PDF & web
OpenStaxIntroductoryPrinciples of Management
Management theory that respects practice — planning, organizing, leading, and controlling, free from OpenStax.
40h read18 ch
Video course
NPTELIntermediateComputer Graphics
How images on your screen are really made — the IITs' graphics course.
40h43 lec
Video course
NPTELIntroductoryLinear Algebra
The classic IIT Madras linear algebra course — vectors, matrices, eigenvalues, and the theorems every engineer and data scientist needs.
40h52 lec
Video course
NPTELAdvancedSemiconductor Optoelectronics
IIT Delhi on light and semiconductors — LEDs, lasers, and photodetectors, from first principles up.
40h46 lec
Video course
NPTELIntroductoryEngineering Mechanics
The first course of every engineer — forces, bodies, and balance.
39h40 lec
Video course
NPTELIntermediateComputer Architecture
The machine under the compiler — pipelines, caches, and cores.
38h41 lec
Video course
NPTELIntroductoryProbability and Statistics
Chance, done properly — the math every data scientist needs.
38h40 lec
Video course
NPTELIntermediateDigital Image Processing
From pixels to perception — the IITs' classic image processing course.
38h40 lec
Book · PDF & web
OpenStaxIntroductoryPsychology 2e
The full introduction to psychological science — biology of behavior through social psychology — free from OpenStax.
37h read16 ch
Video course
NPTELAdvancedTheory of Computation
Automata, Turing machines, and what can never be computed.
36h70 lec
Video course
NPTELAdvancedHeat Transfer
Conduction, convection, radiation — the thermal engineering trilogy.
36h61 lec
Video course
NPTELAdvancedDigital Signal Processing
The mathematics inside every phone — DFT, FFT, and digital filters.
36h107 lec
Video course
NPTELIntermediateOperations Management
The engines of business — inventory, scheduling, and lean systems.
36h41 lec
Video course
NPTELAdvancedQuantum Mechanics
The IITs' complete quantum mechanics course — from the Schrödinger equation onward.
36h41 lec
Video course
BerkeleyIntermediateIntroduction to Artificial Intelligence
Search, games, and rational agents — home of the Pac-Man projects.
35h27 lec
Video course
NPTELIntroductoryDiscrete Mathematics
The mathematics computer science runs on — logic to graph theory.
35h41 lec
Book · PDF & web
OpenStaxIntroductoryIntroductory Statistics 2e
Statistics the way it should be taught — descriptive through inferential, with real datasets, free and peer-reviewed.
35h read13 ch
Video course
NPTELAdvancedAnalog VLSI Design
The transistor-level craft — IIT Kanpur's complete analog chip design course.
35h64 lec
Video course
BerkeleyIntroductoryFoundations of Data Science
Berkeley's famous intro to data science — no prerequisites, real inference.
34h40 lec
Video course
NPTELIntermediateGenetic Engineering: Theory and Application
Editing the code of life — the theory and tools of genetic engineering, from the IITs.
34h42 lec
Video course
NPTELIntroductoryProgramming in Java
The IITs' Java course — among the most-enrolled in NPTEL history.
33h61 lec
Video course
NPTELIntermediateAn Introduction to Programming through C++
Modern C++ — classes, templates, and the STL, taught properly.
33h121 lec
Video course
NPTELIntermediateComputer Networks and Internet Protocol
The internet, layer by layer — from the IITs' networking group.
33h61 lec
Video course
NPTELIntermediateThermodynamics
Energy, entropy, and the laws that rule every engine.
33h69 lec
Book · PDF & web
Open TextbooksIntermediateOperating Systems: Three Easy Pieces
The operating systems book the internet learned from — virtualization, concurrency, and persistence, one short chapter at a time.
33h read66 ch
Book · PDF & web
OpenStaxIntroductoryPrecalculus 2e
The complete precalculus textbook — algebra, trigonometry, and analytic geometry, everything calculus assumes.
33h read12 ch
Video course
CMUIntermediateIntroduction to Database Systems
Andy Pavlo's database course — storage engines to query optimizers, from the people who build them.
33h26 lec
Video course
MITIntroductorySingle Variable Calculus
Calculus taught the way MIT teaches it to freshmen.
32h39 lec
Video course
NPTELIntermediateAn Introduction to Artificial Intelligence
IIT Delhi's modern AI survey — search, RL, NLP, and vision in one arc.
32h99 lec
Video course
MITIntermediateEconomic Applications of Game Theory
MIT's newest game theory course — strategic thinking for economists, from dominance and Nash equilibrium to mechanism design.
32h25 lec
Video course
NPTELIntermediateMachine Learning for Engineering and Science Applications
IIT Madras teaches machine learning to engineers and scientists — the same algorithms, taught for physical systems and scientific data.
32h106 lec
Video course
NPTELIntroductoryFoundations of Psychology: Concepts and Applications
IIT Guwahati's complete psychology foundations course — the science of mind and behavior, from neurons to social dynamics.
32h34 lec
Video course
NPTELIntroductoryBasic Electric Circuits
The starting line of electrical engineering — KVL to AC power.
31h61 lec
Book · PDF & web
OpenStaxIntroductoryUniversity Physics Volume 1
Rice University's peer-reviewed university physics text — mechanics, waves, and thermodynamics, free and complete.
31h read17 ch
Video course
StanfordIntroductoryArtificial Intelligence: Principles and Techniques
Stanford's survey of AI — search, games, MDPs, and machine learning under one roof.
31h60 lec
Video course
NPTELIntroductoryOrganizational Behaviour
Why organizations behave as they do — motivation, teams, and leadership, studied scientifically.
31h60 lec
Video course
NPTELIntroductoryFinancial Institutions and Markets
IIT Kharagpur on how money actually moves — banks, bond markets, equities, and the institutions that hold the system together.
31h61 lec
Video course
NPTELIntermediateFundamentals of Semiconductor Devices
IISc Bangalore on the physics of the devices the modern world runs on — from band diagrams to transistors, taught properly.
31h60 lec
Video course
YaleIntroductoryFreshman Organic Chemistry I
Organic chemistry as ideas, not flashcards — Yale's famous rethinking.
30h37 lec
Video course
BerkeleyAdvancedDeep Reinforcement Learning
Sergey Levine's graduate course — the deepest open treatment of RL anywhere.
30h97 lec
Video course
NPTELAdvancedCompiler Design
How code becomes machine code — lexers to optimizers.
30h62 lec
Video course
NPTELIntermediateSignals and Systems
The mathematics of everything that varies — audio to control.
30h103 lec
Video course
NPTELIntermediateControl Systems
Making machines behave — stability, root locus, and feedback.
30h73 lec
Video course
NPTELIntermediatePhysical Chemistry
Chemistry as physics — thermodynamics, kinetics, and the quantum rules.
30h53 lec
Video course
MITIntroductoryThermodynamics and Kinetics
The chemistry of energy — MIT's foundational physical chemistry course.
30h36 lec
Video course
MITAdvancedPerformance Engineering of Software Systems
Make programs fast — cache hierarchies, concurrency, and the art of measurement.
30h23 lec
Video course
MITAdvancedDeep Learning
MIT's graduate deep learning course — from backpropagation foundations to transformers, diffusion models, and the research frontier.
30h24 lec
Video course
MITIntermediatePublic Finance and Public Policy
What governments should tax, spend, and regulate — MIT's applied economics of the public sector, with real policy throughout.
30h24 lec
Video course
MITIntermediateMultivariable Calculus
Vectors, surfaces, and the geometry of higher dimensions.
29h35 lec
Video course
MITAdvancedThe Early Universe
Cosmology's first three minutes — taught by the man who named inflation.
29h23 lec
Video course
YaleIntroductoryIntroduction to Ancient Greek History
The rise and fall of classical Greece — from a master historian.
29h24 lec
Video course
BerkeleyAdvancedIntroduction to Machine Learning
The mathematics of learning — regression to networks, all derived.
29h32 lec
Video course
NPTELAdvancedFundamentals of Power Electronics
Converters and inverters — the electronics inside solar and EVs.
29h97 lec
Video course
MITIntroductoryIntroduction to CS and Programming Using Python
MIT's newest first course — Python for absolute beginners.
28h26 lec
Video course
MITIntroductoryIntroduction to Biology
Molecular biology the MIT way — from DNA to developing embryos.
28h35 lec
Video course
StanfordIntermediateMachine Learning with Graphs
The science of networks — from PageRank to graph neural networks.
28h19 lec
Video course
NPTELIntroductorySoftware Engineering
Why software projects fail — and the discipline that prevents it.
28h60 lec
Video course
NPTELIntroductoryProgramming, Data Structures and Algorithms using Python
The engine of IIT Madras's online BSc degree — Python to algorithms.
28h84 lec
Video course
MITIntermediateStatistics for Applications
Mathematical statistics done properly — estimation, testing, and asymptotics.
28h22 lec
Video course
MITIntermediateData Analysis for Social Scientists
Statistics with social science questions attached — MIT's data analysis course for economics.
28h23 lec
Video course
NPTELIntroductoryBasics of Materials Engineering
Why materials do what they do — IIT Madras' complete first course in materials.
28h67 lec
Video course
HarvardIntermediateStatistics 110 — Probability
Probability as storytelling — the famous Stat 110 lectures.
27h32 lec
Video course
BerkeleyIntermediateGreat Ideas in Computer Architecture
From C code to circuits — how computers actually work.
27h27 lec
Video course
MITIntroductoryPrinciples of Chemical Science
Freshman chemistry taught through the lens of real research.
27h36 lec
Video course
NPTELIntermediateBiochemistry
Life at the molecular scale — proteins, enzymes, and metabolism.
27h34 lec
Video course
NPTELAdvancedAlgorithms in Computational Biology and Sequence Analysis
The algorithms inside modern biology — taught at the Indian Institute of Science.
27h48 lec
Video course
MITIntermediateDifferential Equations
The mathematics of everything that changes — MIT's bridge course.
26h33 lec
Video course
StanfordIntermediateThe Fourier Transform and Its Applications
The mathematics of signal and image — a Stanford classic.
26h30 lec
Book · PDF & web
OpenStaxIntroductoryCollege Algebra 2e
College algebra, complete and free — functions, exponentials, logarithms, and the algebra everything after depends on.
26h read9 ch
Video course
MITIntermediateTopics in Mathematics with Applications in Finance
The mathematics of real markets — probability, linear algebra, and optimization, aimed straight at modern finance.
26h22 lec
Video course
StanfordIntermediateProgramming Abstractions
C++, recursion, and data structures — the classic follow-up to CS106A.
25h27 lec
Video course
YaleIntroductoryFundamentals of Physics I
Newtonian mechanics from a physicist audiences love.
25h20 lec
Video course
NPTELIntermediateData Structures and Algorithms
The classic IIT Kharagpur DSA lectures — stacks to spanning trees.
25h40 lec
Video course
MITAdvancedFinance Theory I
MIT Sloan's canonical finance course — valuation to portfolio theory.
25h20 lec
Book · PDF & web
Open TextbooksIntroductoryThink Python, 3rd Edition
Python as a way of thinking — the friendliest serious introduction to programming, now in its third edition.
25h read20 ch
Video course
NPTELIntermediateIntroduction to Embedded System Design
The computers inside everything — microcontrollers, buses, and real-time design.
25h41 lec
Video course
MITIntermediatePrinciples of Discrete Applied Mathematics
MIT's bridge from computation to proof — induction, graphs, counting, and probability, with the discrete structures CS runs on.
25h20 lec
Video course
MITIntermediatePerception
How the brain builds a world from light and sound — MIT Brain and Cognitive Sciences on the machinery of perception.
25h23 lec
Video course
YaleIntroductoryDeath
The most famous philosophy course on the internet.
24h26 lec
Video course
NPTELIntroductoryEntrepreneurship
From idea to venture — the IIT playbook for starting things.
24h44 lec
Video course
MITIntroductoryArtificial Intelligence
Patrick Winston's legendary AI course — how to think about representing knowledge.
24h30 lec
Video course
StanfordIntermediateIntroduction to Linear Dynamical Systems
Stephen Boyd's own course — state-space systems, reachability, and least squares at work.
24h20 lec
Video course
StanfordAdvancedLanguage Modeling from Scratch
Build a large language model end to end — Stanford's course on how the machine is actually made.
24h18 lec
Video course
StanfordIntermediateParallel Computing
Why is my program not faster? — the parallel computing course for the many-core era.
24h19 lec
Video course
NPTELIntermediateOperations Research
The mathematics of decisions — linear programming, queues, and optimization.
24h41 lec
Video course
StanfordAdvancedProgramming Paradigms
C, assembly, and the machine beneath your language.
23h25 lec
Video course
NPTELIntroductoryIntroduction to C Programming
C from first principles — the language the IITs teach first.
23h60 lec
Video course
YaleIntroductoryIntroduction to Theory of Literature
Derrida, Foucault, and the rest — finally made comprehensible.
22h26 lec
Video course
NPTELIntermediateOrganic Chemistry
Carbon's architecture — mechanisms over memorization, the IIT way.
22h53 lec
Video course
StanfordAdvancedDeep Multi-Task and Meta Learning
How machines learn to learn — Chelsea Finn's graduate course on meta-learning.
22h17 lec
Video course
HarvardIntermediateCS50's Introduction to Game Development
Recreate Pong, Mario, and Zelda — game engines and design, taught at CS50 quality.
22h13 lec
Video course
MITIntermediateProbabilistic Systems Analysis and Applied Probability
The clearest probability course on earth, taught by its textbook's author.
21h25 lec
Video course
YaleIntermediateFrontiers and Controversies in Astrophysics
Dark matter, exoplanets, and black holes — taught through live debates.
21h29 lec
Video course
YaleIntroductoryIntroduction to the New Testament
The New Testament as literature and history — Yale's famously engaging close study.
21h26 lec
Video course
MITIntroductoryGame Design
MIT's studio course on designing games — mechanics, balance, prototyping, and playtesting, taught by building real games.
21h19 lec
Video course
MITIntroductoryMathematics for Computer Science
Proofs, graphs, and counting — discrete math as a contact sport.
20h25 lec
Video course
MITIntroductoryIntroduction to Psychology
How the mind works — the science, not the pop version.
20h24 lec
Video course
MITIntroductoryThe Analytics Edge
Data analytics taught through real, messy, high-stakes cases.
20h24 lec
Video course
MITAdvancedDistributed Computer Systems Engineering
How to build systems that survive failure — from the masters.
20h20 lec
Video course
YaleIntroductoryIntroduction to Psychology
The mind, taught by one of its best explainers.
20h20 lec
Video course
NPTELIntermediateIntroduction to Machine Learning
IIT Madras's classic ML survey — rigorous, examinable, free.
20h40 lec
Video course
NPTELIntroductoryThe Joy of Computing using Python
Python taught through games, puzzles, and real-world magic.
20h40 lec
Video course
NPTELIntermediateCloud Computing
Virtualization, IaaS, and the engineering of the cloud — from IIT Kharagpur.
20h40 lec
Video course
MITAdvancedThe Human Brain
What makes us human? An fMRI tour of the mind's specializations.
20h17 lec
Video course
YaleIntroductoryPhilosophy and the Science of Human Nature
Philosophy, psychology, and law in one course about being human.
20h26 lec
Video course
YaleIntroductoryFoundations of Modern Social Theory
Marx, Weber, Durkheim, and Freud — the toolkit of social thought.
20h25 lec
Video course
YaleIntroductoryFrontiers of Biomedical Engineering
Where engineering meets the body — implants, imaging, and drug delivery.
20h25 lec
Video course
StanfordAdvancedReinforcement Learning
Agents that learn from consequences — taught with unusual rigor.
20h16 lec
Video course
NPTELIntermediateOperating System
What Linux is actually doing — processes to file systems.
20h50 lec
Book · PDF & web
Open TextbooksIntermediatePython Data Science Handbook
The field guide to the scientific Python stack — IPython, NumPy, pandas, Matplotlib, and scikit-learn from one of its core developers.
20h read60 ch
Book · PDF & web
OpenStaxIntroductoryPrinciples of Data Science
OpenStax's data science text — statistics meets computation, from data ethics to machine learning, free.
20h read10 ch
Video course
YaleIntroductoryListening to Western Music
How to hear what composers are actually doing.
19h23 lec
Video course
YaleIntroductoryEuropean Civilization, 1648–1945
Three centuries of Europe, told by a storyteller at full gallop.
19h24 lec
Video course
NPTELIntroductoryMarketing Management
Marketing as a discipline — segmentation, brands, and metrics.
19h37 lec
Book · PDF & web
OpenStaxIntermediateCalculus Volume 2
Calculus, volume 2 — integration techniques, differential equations, sequences and series, and parametric curves.
19h read7 ch
Book · PDF & web
OpenStaxIntermediateCalculus Volume 3
Calculus, volume 3 — vectors, partial derivatives, multiple integrals, and vector calculus, the complete third semester.
19h read7 ch
Video course
YaleIntermediateMilton
Paradise Lost, line by line — Yale's celebrated close reading of Milton.
19h24 lec
Video course
YaleIntroductoryEarly Modern England: Politics, Religion, and Society
Tudors, civil war, and ordinary lives — England's turbulent birth into modernity.
19h25 lec
Video course
NPTELIntroductoryIntroduction to Cell Biology
IISER Pune on the fundamental unit of life — membranes, organelles, DNA, and the molecular machines inside every cell.
19h59 lec
Video course
StanfordAdvancedAlgorithmic Game Theory
When algorithms meet strategic humans — auctions, pricing, and the internet.
18h20 lec
Video course
YaleIntroductoryIntroduction to Political Philosophy
Machiavelli to Marx — who should rule, and why anyone gets to.
18h24 lec
Video course
StanfordIntermediateDeep Learning for Computer Vision
The course that taught the world to teach machines to see.
18h15 lec
Book · PDF & web
OpenStaxIntroductoryIntroduction to Computer Science
The newest OpenStax title — computer science from data representation to machine learning, free from day one.
18h read14 ch
Video course
MITIntroductoryClassical Mechanics
MIT's OCW Scholar mechanics course — a complete first physics semester, built for self-study.
18h215 lec
Video course
YaleIntroductoryThe Early Middle Ages, 284–1000
How Europe became Europe — Paul Freedman's irresistible history of late antiquity.
17h22 lec
Video course
HarvardIntermediateCS50's Web Programming with Python and JavaScript
HTML to Django to React — modern web development, properly taught.
16h8 lec
Video course
NPTELIntermediateData Mining
Finding structure in oceans of data — the IIT Kharagpur survey.
16h36 lec
Book · PDF & web
OpenStaxIntroductoryAdditive Manufacturing Essentials
The 3D printing textbook — how additive manufacturing actually works, from processes and materials to economics.
16h read8 ch
Video course
HarvardIntroductoryCS50's Introduction to Programming with Python
Python from zero, the CS50 way — functions, loops, and real programs from week one.
16h11 lec
Video course
NPTELAdvancedDesign and Analysis of Algorithms
Algorithms with the proofs kept in — the IIT Madras classic.
15h56 lec
Video course
MITIntroductoryCalculus Revisited: Multivariable Calculus
Herbert Gross's beloved 1970s refresher — vectors, partial derivatives, and multiple integrals, humanely taught.
14h26 lec
Video course
HarvardIntermediateCS50's Web Programming with Python and JavaScript
Harvard's full-stack web course — Django, SQL, JavaScript, and React, taught by shipping project after project.
14h10 lec
Video course
MITIntroductoryIntroduction to Computational Thinking and Data Science
From Python basics to stochastic thinking and machine learning.
12h15 lec
Video course
HarvardIntermediateCS50's Introduction to Artificial Intelligence with Python
Search, knowledge, uncertainty, and learning — hands-on in Python.
12h6 lec
Video course
MITIntroductoryIntroduction to Computational Thinking and Data Science
The beloved sequel to MIT's intro CS course — graphs, stochastic thinking, optimization, and statistics, taught through Python.
12h15 lec
Video course
HarvardIntermediateCS50's Introduction to Artificial Intelligence with Python
Harvard's AI course for everyone who finished CS50x — search, knowledge, uncertainty, optimization, learning, and neural networks, in Python.
12h8 lec
Video course
HarvardIntroductoryCS50's Introduction to Databases with SQL
Databases from zero — the newest member of the CS50 family.
11h8 lec
Book · PDF & web
OpenStaxIntroductoryCalculus Volume 1
The open calculus text — functions, limits, derivatives, and integration, free from Rice University's textbook press.
11h read6 ch
Video course
StanfordAdvancedDeep Learning
Andrew Ng's applied deep learning course, freshly updated.
10h10 lec
Video course
MITIntroductoryHighlights of Calculus
Strang's short course on the big picture of calculus — derivatives in five minutes, truly.
10h18 lec
Video course
HarvardIntroductoryCS50's Introduction to Cybersecurity
Harvard's practical guide to staying safe — and thinking like an attacker — with the CS50 production team behind it.
8h6 lec
Video course
MITIntroductoryDynastic China
Two thousand years of Chinese history in one MIT course — from the Qin unification to the last emperors, taught with primary sources.
5h4 lec
The finest universities on earth publish their courses. Free.
Not samples. Not trials. Complete semesters — lectures, problem sets, exams — and peer-reviewed textbooks, under licenses that let you watch, read, download, and keep them forever.
View coursesThe movement that started it all. Every lecture, problem set, and exam from more than 2,500 MIT courses — published for the world, free forever.
41 in Atlas2,500+ full catalog
View coursesThe home of CS106A and the birthplace of modern machine learning teaching. Stanford publishes its most famous engineering courses on the open web.
20 in Atlas100+ full catalog
View coursesCS50 — the largest on-campus course at Harvard and Yale combined — plus Statistics 110, free to the world with full problem sets and walkthroughs.
11 in Atlas40+ full catalog
View coursesOpen Yale Courses records full semester lectures — with transcripts, MP3 audio and MP4 video downloads for every single session.
19 in Atlas50+ full catalog
View coursesThe legendary CS61 series — taught by the professors who wrote the textbooks — with full lectures, labs, and projects published every semester.
6 in Atlas150+ full catalog
View coursesA government-backed consortium of the Indian Institutes of Technology and IISc. 800+ complete engineering courses, with free certification exams.
57 in Atlas800+ full catalog
View coursesRice University's nonprofit textbook press: peer-reviewed, openly licensed books for physics, biology, economics, psychology, and more — used by millions of students.
25 in Atlas70+ books full catalog
View coursesThe home of the Database Group's famously complete systems lectures — Andy Pavlo's 15-445 is the internet's favorite deep dive into how databases actually work.
1 in Atlas100+ full catalog
View coursesThe internet's beloved faculty-written textbooks — Operating Systems: Three Easy Pieces, Mathematics for Machine Learning, Think Python — published free by the professors who wrote them.
5 in Atlas10+ books full catalog
Streaming from the world's best universities and educators
Three steps. Zero friction.
Atlas is deliberately simple: a catalog that streams and a catalog that downloads — no account wall between you and lecture one.
- 01
Find
Filter by university, subject, and level. Every course in Atlas was hand-picked and link-verified — no dead links, no bait.
- 02
Watch
One click and lecture one is playing right here — streamed from the university's own channel, in full quality.
- 03
Keep
MIT hands you the entire course as a ZIP. Yale gives you MP3, MP4, and transcripts. Everything official, everything legal.
Why is all of this free?
In 2001, MIT announced it would give away its course materials to the world. Colleagues thought MIT had lost its mind — why pay tuition if the courses were free? MIT's answer: the value of an education was never in the lecture notes. It was in the people, the lab, and the degree. And the world's knowledge, they believed, should not sit behind a gate.
Twenty-five years later, OpenCourseWare is a movement: 2,500+ MIT courses, all of Open Yale, NPTEL from every Indian Institute of Technology — hundreds of thousands of hours, published under Creative Commons licenses that expressly permit you to watch, download, share, and keep them. This is not a loophole. It is the point.
Atlas exists to make that library feel the way it deserves to feel: as beautiful and as effortless as the knowledge inside it is deep.
What Atlas does
- · Indexes courses the universities themselves published
- · Streams from their official channels
- · Downloads from their official servers
- · Preserves attribution and license on every page
What Atlas never does
- · Re-host or re-encode any university's files
- · Index paid courses from commercial platforms
- · Strip creator attribution or watermark anything
- · Ask you for a login, a fee, or your data