The Math League
The Math League: Integers
This site provides a detailed overview of integers, including positive and negative integers, number lines, absolute values of integers, and comparing integers.
Purple Math
Purplemath: Negative Exponents
This resource covers negative exponents and demonstrates how to simplify expressions containing them. Explains why "to the power zero" means "equals 1".A negative exponent just means that the base 'x' is on the wrong side of the fraction...