This activity introduces factoring in a hands-on way. Students identify "C" in their trinomial and count out that many pieces of cereal. The goal is to make as many rectangles with "C" area as they can and write down the side length pairs. Of these pairs, which pair adds to "B"? You factored a trinomial!
For more detailed explanation of how to use this area model when introducing factoring, here is a blog post with detailed photos and explanations: Factoring Quadratics in Special Ed
You may also like:
Factoring Notes Simplified