This is a lesson on solving quadratic equations by factoring. There are several different ways to teach factoring, but this lesson is designed around factoring by grouping (also known as the AC method, split the middle, etc.). The lesson starts with a review of factoring by grouping, and then it makes the transition to quadratics with 3 terms. There are several examples to do as a class, and then several examples for students to do on their own. This lesson also addresses the special case of