Gae Plus Yu
Gae Plus Yu is a mathematics workbook set designed for elementary and middle school students. The set combines a Concept book and a Drill book, which are bound together with adhesive and can be separated by light pressure. Each book carries a different color and graphic, with colors marking the level of difficulty. The covers are shaped as paired semicircles that form a single circle when placed together. Students can select the level that suits their ability and study both books at the same time. The structure separates concepts from problem types to support independent learning.
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