Description: Structured as a story woven with mathematical meaning—from sparking initial thoughts, through hands-on exploration, to organizing ideas—this innovative elementary math concept book helps children naturally understand and internalize math concepts and principles as they learn. By thoroughly analyzing textbooks, workbooks, and school exam questions, the material is organized by topic and problem type. Using graphic organizers grounded in mathematical logic, children can explain principles in their own words, building insight into problem-solving. Author: CMath Research Institute Recent Works: Saenggak Math 1031 Elementary 4-1 Problem Book, Saenggak Math 1031 Elementary 3-1 Problem Book, Saenggak Math 1031 Elementary 4-1 Concept Book, and 150 titles in total. About the Author: Composed of researchers passionate and talented in math education, the CMath Research Institute develops the best and most optimal math curricula and content to strengthen learners' mathematical thinking, grounded in both the academic nature of mathematics and a learner-centered educational philosophy. The institute has led trends in math education through programs such as 'CMath,' which popularized the concept of 'thinking math'; the gifted-education program 'Gifted'; published series including the '1031' Math & Science series, '1031 Gifted Assessment,' 'Top-Tier 960' series, 'Top-Tier Clever Math' series, 'Thinking Preschool Math' series, and 'Top-Tier Math TenTen: Exploration and Problem Solving' series; as well as a wide range of multimedia math content.