◆ This is educational material from the Shinken Zemi Junior High and High School Integrated Course from four years ago. I couldn't use it all and have been storing it, but I'm listing it in case anyone would like to use it. ◆ It's a set of correction problems from the "Red Pen Teacher" (a service where students submit their work for feedback), but the answer sheets for the correction problems themselves are not included. There are workbooks with the drills needed to tackle the correction problems, and the answers to those drills are included, so I think you'll be able to work on that part. ◆ I've stored it at home, and the contents are free of writing, so I think you can use it comfortably. Please check the condition in the photos. Please consider this item understanding that it is a used item. ◆ I may use recycled packaging materials, but I will choose the cleanest ones possible and pack them carefully with care. ◆ No pets, no smoking.