Nix the Tricks Book Study - Chapter 3: Proportional Reasoning
This post is part of an ongoing book study series on Nix the Tricks by Tina Cardone. Each week, a group of math teachers meets to reflect on one chapter of the book and discuss how we can move away from shortcuts and toward true mathematical understanding. You can find our reflections from Chapter 1: Introduction and Chapter 2: Operations in previous posts and follow along as we continue through the book. Chapter 3, “Proportional Reasoning,” was one of the heaviest sections we’ve read so far. It’s packed with tricks that almost every math teacher has encountered at some point: Butterfly Method , Flip and Multiply , Cross Multiply , and the Formula Triangle , to name a few. These are the kinds of tricks that often sneak into students’ repertoires long before they truly understand what a proportion or ratio represents. As we discussed this chapter, one central question emerged: “Do students ever really understand the math behind these shortcuts, or do they lose the reasoning once ...