This is a description of math textbooks for 4th graders, explaining how to learn through games and hands-on activities. "Cultivating Interest and Motivation in Math Based on Quantity" Authors: Hiroaki Kamabayashi, Masao Wada 4th Grade Elementary School Price: 1,650 yen "Instructional Methods for Important Math Materials Through Activities and Games" Supervised by: Hiroshi Ginbayashi, Edited by: Hiroshi Shiraishi 4th Grade Elementary School Price: 1,550 yen each ★These books are almost unused but have been stored at home for a long time. ★The cover has some scratches, minor damage, and discoloration. There are no writings or creases. Please consider purchasing if you understand that these are items that have been stored at home for a long time.