Sparknotes.com, ProProfs.com and Math.com offer online study guides for mathematics. Each site has practice tests and additional study aids. These sites cover categories including algebra, trigonometry, geometry and basic arithmetic.
Sparknotes.com provides 11 categories of math study guides. Each category has six to 12 subdivisions. The subdivisions have introductions that include relevant terms and formulae, followed by a selection of problems with detailed explanations. At the conclusion of each subdivision is an introduction to the next section.
ProProfs.com has a free online study guide specifically for the SAT with interactive study aids for SAT math. The four main sections are numbers and operations; algebra and functions; geometry and measurement; and data analysis, statistics and probability. The sections are divided into specific modules, such as algebraic expressions, triangles, rational numbers and word problems. In keeping with the SAT guidelines, users must complete each module within a specified time limit. The site also includes a full SAT math practice test consisting of three sections that are timed to reflect the real test.
Math.com offers a variety of practice subjects that include basic math, geometry, algebra and calculus. The practice tests begin with a basic introduction to the subject and then get progressively more advanced. The site includes calculators and other tools, and it offers advice on finding a math tutor. For light-hearted study and fun, Math.com provides games and puzzles.