abcteach
Abcteach: Math Posters
[Free Registration/Login Required] Most of the posters on this site are colorful math posters for primary or elementary school. However, there is one math poster that could be used in secondary school geometry class that has the formulas...
Wyzant
Wyzant: Perfect Square List
WyzAnt provides a list of numbers and their squares. The user decides how many perfect squares to be displayed and in what fashion. The table makes a good reference sheet for students and teachers.
Math2
Math2: Fraction to Decimal Conversion
This tutorial features conversions of basic fractions in lowest terms and the decimal equivalents.