Yotsuya Otsuka Yosyu Series 6th Grade Textbook, Volume 1, and Exercise Workbook Set. All with answer keys and explanations. Purchased in 2024. Revised text. Both the textbook and exercise workbook for all 4 subjects consist of 18 lessons. There are no names written, but the name sticker has been removed from the Grade 6 Social Studies summer assignment. The Social Studies textbook has many markings as I have underlined the parts I wanted to remember. The Kanji and Words section has many markings as it was used for homework. [Math] ・Textbook → No writing. There are no answer sheets for math. ・Exercise Workbook → No writing. There are no answer sheets to begin with. All marks made with friction pens or pencils in both the textbook and exercise workbook have been erased. [Japanese] ・Textbook → Underlining on 16 pages of passages and 1 page of vocabulary. No answers are written in the problems. All answer sheets are included. ・Exercise Workbook → Underlining on 26 pages of passages. No answers are written in the problems. All answer sheets are included. ・Kanji and Words → Writing on 70% of the Kanji review questions, and underlining with a highlighter on 7 pages of vocabulary questions. No answers are written in the vocabulary questions. All answer sheets are included. [Science] ・Textbook → Underlining with a highlighter on 10% of the pages. No answers are written in the problems. Only the answer sheets for the combined test preparation problems at the end of the book have been used. ・Exercise Workbook → Highlighting of answer choices and writing on 20% of the pages. 50% of the answer sheets are included. [Social Studies] ・Textbook → Underlining with a highlighter on 80% of the pages. Answers are written only on the practice problems (7 pages) of the 18th comprehensive lesson. 70% of the answer sheets are included. ・Exercise Workbook → Writing and underlining on 20% of the pages. There are 7 pages in the answer key booklet where mistakes have been highlighted. 80% of the answer sheets are included. ・Summer Assignment (Waseda Academy) → Mostly written in, but includes a summary of the historical timeline, so it will be included as a bonus. I have carefully inspected the items, but please forgive any oversights. Please understand that these are used items that a child used for exam preparation before purchasing. I am not considering selling the items separately. I would like to sell them to someone who will purchase them as a set.