Yosyu Series Social Studies, 6th Grade Exercise Workbook, Volume 1: 1 book, Answer Key: 1 book (some answer sheets missing) Volume 2: 1 book, Answer Key: 1 book (some answer sheets missing) Total: 4 books. Names will be erased or cut out before shipping. Workbooks: Generally no writing, but there are some red pen check marks for incorrect answers. Answer Keys: Some answer sheets are missing as they were submitted for homework. These books were used at a cram school, so please purchase if you don't mind minor imperfections. For students who will finish in 2026.