This document is from an exponents lesson on zero and negative exponents. It states that anything raised to the 0th power is equal to 1. It also describes the rule for negative exponents, which is that if the exponent is negative, the base and exponent are moved to the denominator if the exponent was in the numerator, or moved to the numerator if the exponent was originally in the denominator. The document provides examples and practice problems for students to work through related to these rules.