A textbook that clearly explains mathematics for first-year junior high school students. - Title: Really Understand Junior High 1st Grade Math - CD-ROM: Includes a CD-ROM - Solution Guide: Clearly navigates how to solve math problems The CD and most of the book are unused. I bought this for my child, but they only solved a few pages, so it's 90% unused. However, it was kept on a bookshelf, so there are some scratches and wear on the outside. Please check the photos carefully. I erased the written parts cleanly, but I've included photos of areas where the eraser marks are noticeable, so please purchase only if you understand this. As an apology, I will include a junior high 1st grade science book (with 14 pages written on) as a bonus.