An online math encyclopedia and textbook, all in one. Its entries are referenced in journals and books spanning all educational levels, including those read by researchers, elementary school students and teachers, engineers, and hobbyists.
Interactive modules on solving matrices, determinants, vector spaces, and linear transformations problems. Maintained by Przemyslaw Bogacki in the Department of Mathematics and Statistics, Old Dominion University.
Includes an online statistics text, simulations that demonstrate various statistical concepts, and case studies in statistics. Note: The online text includes many advertisements; see the table of contents on the left side of the page.