Purchasing this item along with the separately listed "Arithmetic 123" will complete the set. Answer keys and explanations are also included. While there is generally no writing, there may be checks on incorrect answers. I believe this will not hinder your ability to solve the problems, so please understand that this is a used item. There is a name written on the book, which will be either cut out or blacked out before shipping. - Set Contents: 4 Arithmetic books (Spring Term, Summer Term, Winter Term, Calculation) - Publisher: Mabuchi Kyoiku (Mabuchi Education) - Target Grade Level: Elementary School 3rd Grade - Language: Japanese - Format: Textbook Thank you for looking.