__Unit Overview:__The central theme of this unit is that the arithmetic operations of rational expressions is governed by the same rules as the arithmetic operations of rational numbers. Students will draw on analogies between polynomial, and rational arithmetic to base-ten computation, focusing on operations. Rational expressions learned from this session will be extended through to the next segment on rational equations and inequalities.

__Enduring Understanding:__- Rational expressions can be manipulated and presented in a variety of equivalent ways.

__Essential Questions:__- How can a polynomial be classified? How do you decide which classification to use?

- Why do we factor polynomials?
- Can basic operations of the number system be applied to polynomial and rational expressions?