Resources
Free books, simulations, tools and reference sheets, chosen and shared by teachers and learners. Pick a subject and a level to see what is there.
Reading MaterialExternal link
The official school mathematics textbooks, free to read and download. Pick the book of your class. Our chapters follow their order.
Reading MaterialExternal link
Free videos, articles and practice for school mathematics, from arithmetic to calculus. Good when you want to see an idea explained a second way.
Reading MaterialExternal link
A free textbook on functions, polynomials, exponents and trigonometry, with many practice problems. Free to read online, from OpenStax at Rice University, licensed under CC BY 4.0.
SimulationsExternal link
Change the slope and the intercept, and see the line, its equation and points move together. Pairs with the lessons on linear equations. Simulation by PhET Interactive Simulations, University of Colorado Boulder, licensed under CC BY 4.0 (https://phet.colorado.edu).
SimulationsExternal link
Draw points, lines, circles and graphs, and move them to test an idea in geometry or algebra. Free and used by teachers all over the world.
SimulationsExternal link
Type an equation and see its graph at once. Drag a slider to change a number and watch the graph move. Free, and it works in the browser.