This book provides dozens of carefully prepared letters for parents in English and Spanish that teachers can send home weekly. Each of the 40 letters focuses on direct and easy-to-implement mathematics activities that can be incorporated regularly into a family's daily routine without turning the home into a school away from school. The letters focus on whole numbers, decimals, fractions and mixed numbers, geometry, measurement, ratios and percents, statistics, probability, and special energizers. (ASK)