Yojin Series Social Studies Year 4, Volume 1 Exercise Workbook Social Studies Year 4, Volume 1 The textbook has markings with a highlighter, etc. Answer sheets are only available for the 5th session. The exercise workbook has no writing (there may be oversights). Answer sheets are only available for the following, comprehensive sections: 5th session: Application, Challenge 10th session: Application, Challenge 15th session: Practice, Application, Challenge 20th session: Application, Challenge All items have been used by a child, so please refrain from purchasing if you are concerned. Name written, then erased. Immediate purchase is okay!