Description: A serious math introduction book for young children. Through the combination of numbers and shapes, it develops abstract and logical thinking as well as intuitive and sensory thinking at the same time. Thinking Preschool Math 3A: Serious Math Introduction for Preschoolers (Ages 6-8) - First half: Shapes - Second half: Sets, Correspondence, Measurement Thinking Preschool Math 3B: Serious Math Introduction for Preschoolers (Ages 6-8) - First half: Direction, Classification, Arrangement - Second half: Number Operations Author: SIMATH Math Research Institute Recent works: Think Math 1031 Elementary 4-1 Problem Book, Think Math 1031 Elementary 3-1 Problem Book, Think Math 1031 Elementary 4-1 Concept Book, and 146 titles in total. About the Author: The SIMATH Math Research Institute is composed of researchers with passion and talent for math education. Based on the academic characteristics of mathematics and a learner-centered educational philosophy, they research and develop the best and most optimal math curricula and content to strengthen learners' mathematical thinking skills. They have led the flow of math education by developing the 'SIMATH' program, which popularized the concept of 'thinking math,' as well as the 'Gifted' program for gifted students, the '1031' math and science textbook series, the '1031 Gifted Assessment,' the 'Top 960' series, the 'Top Clever Math' series, the 'Thinking Preschool Math' series, the 'Top Math TenTen: Exploration and Solving of Problems' series, and various multimedia math content. Thinking Preschool Math is a serious math introduction series for preschoolers that embodies beautiful math, enjoyable math, thinking math, and everyday life math. By combining numbers and shapes, this workbook develops abstract and logical thinking together with intuitive and sensory thinking. Math is the study of numbers and space. For young children who think and understand through the shapes of objects, a math education method that combines shapes and numbers allows them to experience the essentially abstract world of mathematics in a sensory and concrete way, building their potential and interest in math. [Book Composition] A total of 6 books, 2 books per age group (ages 5-7) [Recommended Ages] Thinking Preschool Math 1A: Serious Math Introduction for Preschoolers (Ages 4-6) Thinking Preschool Math 1B: Serious Math Introduction for Preschoolers (Ages 4-6) Thinking Preschool Math 2A: Serious Math Introduction for Preschoolers (Ages 5-7) Thinking Preschool Math 2B: Serious Math Introduction for Preschoolers (Ages 5-7) Thinking Preschool Math 3A: Serious Math Introduction for Preschoolers (Ages 6-8) Thinking Preschool Math 3B: Serious Math Introduction for Preschoolers (Ages 6-8)