"Raising Children Who Excel in Science: Insights from 1 Billion Data Points" This book analyzes patterns in which children struggle with math and includes practice problems to drill down on the "four units" that often cause difficulties. It claims that this approach also benefits Japanese language, science, and social studies! This book is a helpful resource for parenting. Please check the photos for the condition. I have other items for sale, so please take a look. I offer a 100 yen discount for combined purchases. [Author] Tomotaka Imaki [Publisher] Bunkyosha Many parenting books are available. Please inquire via the question function for combined purchases.