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facil.in is a simple list of free sites for learning online, focused on science, technology and math, plus languages and music theory. Pick a topic to find hand-picked courses, videos, books and tools.
Math
- 01 Basic math Numbers, operations, fractions, percentages and pre-algebra. 24 sites
- 02 Algebra Equations, polynomials, functions, exponents and logarithms. 21 sites
- 03 Geometry Shapes, angles, area, volume, constructions and proofs. 21 sites
- 04 Trigonometry Trig ratios, the unit circle, identities and functions. 21 sites
- 05 Calculus Limits, derivatives, integrals, series and multivariable calculus. 23 sites
- 06 Statistics & probability Data, charts, probability, distributions and inference. 29 sites
- 07 Linear algebra Vectors, matrices, systems, determinants and eigenvalues. 23 sites
- 08 Discrete math Logic, sets, combinatorics, graphs and proofs. 23 sites
- 09 Differential equations First-order equations, systems, Laplace transforms and modeling. 22 sites
- 10 Math for AI Linear algebra, calculus, probability and optimization for machine learning. 25 sites
Science
- 11 Physics Mechanics, energy, waves, electricity and modern physics. 31 sites
- 12 Chemistry Atoms, the periodic table, reactions and organic chemistry. 29 sites
- 13 Biology Cells, genetics, ecology, the human body and biodiversity. 28 sites
- 14 Astronomy The solar system, stars, galaxies and the universe. 28 sites
- 15 Earth sciences Geology, earthquakes, volcanoes, weather, oceans and the environment. 28 sites
Technology
Languages & music
20 topics · 530 free sites.