This is a Z-Kai correspondence course for elementary school students. New School Year Support Work New Grade 5 Mathematics, Japanese Language 2 books - Japanese Language: Unused - Mathematics: Writing on 5 pages out of 24 pages. For those who wish, I can erase the pencil marks, but I cannot erase the circled answers or pen marks. This is a supplementary textbook distributed for reviewing up to Grade 4 during spring break, etc., for those entering Grade 5 next year. In other words, it's for current Grade 4 students, but it's also recommended for Grade 5 and Grade 6 students who want to review past grades, and Grade 3 students who want to prepare in advance. (^^)