My eldest daughter used these, but she no longer needs them, so I'm selling them. They were purchased from Zenkaken. Unused pages: Japanese ① - 6 pages unused. ② - 6 pages unused. ③ - All pages unused. ④ - All pages unused. Math ① - 9 pages unused. ② - 4 pages unused. ③ - All pages unused. ④ - All pages unused. Science - 10 pages unused. English ① - 4 pages unused. ② - None. ③ - None. ④ - None. All books come with explanations and answers. This is a set of 13 books. Due to use, there are scratches, stains, writing, bends, and folds. There are pages that I couldn't photograph. Please understand. (See images 1-17) Would these be useful for your child?