Help your child improve basic math skills or move to the next level with these Math Boosters workbooks from Kumon. Each workbook has full-color pages and combines multiple years of curriculum in one book, following the famous step-by-step Kumon approach, which reduces anxiety and frustration. In Problem Solving with Ratios & Proportions, your child will practice skills that will prepare them for algebra and advanced concepts in mathematics, including STEM subjects that require experience in solving data-oriented problems. Basic statistics and probability concepts are introduced. Softcover, 144 pages. Ages 9 – 11.