I've made a few math-related web sites for the fun of it. You can tell that my style has improved. I hope they are useful.
Math 7 Worksheets
This site contains free math 7 worksheets that I made and used while teaching middle school. Topics that they cover include integers, operations on real numbers, fractions, decimals, percents, solving equations, linear graphs, shapes, and proportional reasoning.
Trigonometric Functions
This site explains the definitions of the trigonometric functions and how they derive from similar right triangles.