A PERFECT STEPPING STONE TO ALGEBRA The Kumon Math Boosters series is designed to help children who either need to improve their basic math skills, or who are slightly ahead of the curve. Math Boosters: Problem Solving with Ratios & Proportions focuses on challenging topics your child must master to be ready for algebra and other advanced math concepts. This book provides practice using ratios and proportions in solving data-oriented problems your child will encounter in school - especially in STEM subjects - and in everyday life. The final unit of the book introduces your child to basic concepts of statistics and probability.