Changing the Face of Math Education Book 2 Second Edition Chapter 4 Ratios, Rates, and Proportions ......Chapter 4 e-book pages (32 pages) ......Chapter 4 PowerPoints (5 PowerPoints - 69 slides) ......Chapter 4 Videos (5 videos - 54:07 min) ......Book 1 Table of Contents ......Book 2 Table of Contents