Z-Kai correspondence course materials for elementary school students. ○ New School Year Support Work - New 6th Grade Math, Japanese Language - 2 books ◯ Summer Vacation Every Study Plus 5th Grade Math/Japanese Language - 1 book 6th Grade Japanese Language - 1 book That's what's included. All are unused. Please note that the Summer Vacation Every Study Plus for 6th grade is only Japanese Language. [Target Age: Elementary School Students] ・ New School Year Support Work This is a separate material distributed to those entering 6th grade next year, for reviewing up to "5th grade" during spring break, etc. In other words, it's for current 5th graders, but it's also recommended for 6th graders who want to review past grades, and 4th graders who want to prepare in advance(^^) ・ Summer Vacation Every Study Plus This is a separate material distributed for reviewing each grade level during summer vacation.