This concise book covers many basic topics on ratios and percents, including equivalent ratios, proportions, scale drawings, rates, and percent change. Readers

This book describes the field of fractions, percentages, decimals and proportions. It shows the relations between these topics, and how they can be taught in a

This series brings students who have gaps in their understanding of math skills and concepts up to speed. "Low Gear" lessons review the basics; "High Gear" less