Desmos is a free graphing and teaching tool for math available on the web as well as on iOS and Android. In addition to plotting equations, classroom activities are available to help students learn about a variety of math concepts.
GeoGebra is an interactive geometry, algebra, statistics and calculus application, intended for learning and teaching mathematics and science from primary school to university level. It is available on multiple platforms, with apps for desktops (Windows, macOS and Linux), tablets (Android, iPad and Windows) and web.
This resource contains video explanations, examples, and practice problems with answers for Arithmetic, Algebra (all levels), Geometry, Statistics, Calculus 1, 2, and 3, Differential Equations, Linear Algebra, plus more math topics and other subjects.
Video presentations, examples, simulations, and test preparation for various math and non-math subjects including Arithmetic, Algebra, Geometry, Calculus, Differential Equations, Linear Algebra, Statistics & Probability, Physics, Biology, History, and Psychology.
This is a great resource for basic math; beginning, intermediate, and advanced (college) algebra; word problems. Watch video explanations, do practice problems, learn immediately whether the answers were correct or not. Worksheets and preparation for standardized tests are also available.
Provided by Lamar University, this web site is helpful for students wanting information on college algebra and all levels of calculus. View class notes and explanations, downloadable handouts, practice problems, and reviews.
The West Texas A & M University web site offers assistance in the beginning, intermediate, and advanced (college) algebra. View tutorials, work sample problems, or prepare for the GED.