★Selected as an Outstanding Children's Book of the Year in South Korea Multiple Times
★Chosen as the Annual Outstanding Science Book by the Korean Science Creative Foundation
★Recommended by School Library Journal
★Recommended by the Korean School Library Association (for lower grades)
★Recommended by the Gyeonggi Province School Library Association

★Helps children to deeply understand mathematical concepts and principles, not just superficial and useless memorization.

★A Playful Introduction to Mathematical Thinking, making math learning easy and fun through simple questions and interesting stories.

★Spans multiple disciplines such as history, culture, and nature, integrating interdisciplinary knowledge to broaden children's horizons.

★Explains step by step according to difficulty levels, allowing children to naturally grasp the system and structure of mathematics.
Suitable for lower elementary school grades.

This series consists of 5 books: "Numbers and Digits," "Geometry," "Graphs," "Patterns and Proportions," and "Calculation."

A set of math learning readers planned specifically for lower elementary school children, it explains the concepts and principles of elementary school mathematics easily through simple questions and interesting stories. This series supplements the rich knowledge of concepts and principles not found in textbooks. The books cleverly combine history, culture, nature, and other disciplines with math problems to stimulate children's interest in mathematics and expand their background knowledge. The core concepts and principles of mathematics do not exist in isolation but are closely connected with daily life and background knowledge.

All themes in this series are presented from simple to difficult, allowing children to gradually, systematically, and naturally master mathematical concepts and principles. All themes adopt the method of "core problem presentation + concept and principle explanation." This not only makes the content clear and organized but also visually easy to read. In addition, the book highlights the connection and integration of mathematics with other fields, proving that mathematics is not just a dry subject composed of exercises.

Mathematics is everywhere, permeating every corner of our lives. It is hoped that children who read this series of books will feel the joy of learning mathematics.

Author: Lee Kwang-young
Ph.D. from Sungkyunkwan University, postdoctoral fellow at the University of Wyoming, visiting professor at the University of Iowa. Currently, he is a professor in the Department of Mathematics at Hanrim University and has participated in the compilation of middle school and high school mathematics textbooks.
He analyzes mathematical principles from various fields such as history, mythology, and movies through writing and speeches, showing the close connection between mathematics and our daily lives.
His works include "The Mathematician in the Art Gallery," "What's So Funny About Mathematics!," "Mathematics at the Dining Table," "Mathematical Stories in Mythology," "The Mathematician's War," "Mathematics Creating a Wonderful World," "Lee Kwang-young's Math Blog," "Stories Behind Mathematics," "Lee Kwang-young's Today's Mathematics," "Mathematics in Movies," "Looking at Mathematics from a Humanistic Perspective," "The Encounter of Mathematics and World History," etc.

Author: Jeon Yeon-jin
Majored in gifted education during graduate school and has been dedicated to the compilation of gifted mathematics education materials after graduation.

Illustrator: Kim Seong-hee
Winner of the 2015 Bologna Children's Book Award.
Graduated from the Department of Visual Design at Hongik University. Creates illustrations for posters, magazines, advertisements, and children's books. Illustrated books include "Are You Okay?", "Looking for TITI," "The Most Absurd Concert in the World," "Fake Diary," "Mr. Picasso's Fruit Shop," "I Will Be a Star Tomorrow," "Shh! In 30 Days, I am Steve Jobs," "Dr. Kang's Four-Dimensional Smartphone," etc.

Illustrator: Kim Won-hee
Majored in visual design in university and currently illustrates children's books. While illustrating for this book, she discovered the mathematics hidden in our lives and felt mathematics become more approachable. She has previously illustrated books such as "Happy Life Together," "The Old Adobe House," "The Forest Country," "The Dream of the Unibrow," etc.

Illustrator: Kim Jeong-eun
Creates illustrations for children's books, hoping to convey the joy of drawing to readers. Works include "Chama Ni is Shy Today," "Summer Light," "The Miracle of the Pink Door," "The Furry Secret," "Pea the Mouse Doesn't Give Up," "The Queen of the Lego Kingdom," "Me," "I'm Really Ten Years Old," "The Hundred-Year School" series, etc.