A preparatory series set for 4th graders, covering Japanese, math, science, and social studies. Almost unused. Social studies and science: A few pages have lines drawn with a highlighter, but it's very minimal. Since I used copies, there are some signs of use, such as folded covers, but overall, I think they are in good condition. - Series Name: Preparatory Series Japanese: Preparatory Series (Volumes 1 & 2), Summer Course Exercise Problem Collection (Volumes 1 & 2) Kanji and Words (Volumes 1 & 2) Math: Preparatory Series (Volumes 1 & 2), Summer Course Exercise Problem Collection (Volumes 1 & 2) 2023 Weekly Test (Volume 1) 2022 Weekly Test (Volume 1) Math's Most Difficult Problem Collection (Volumes 1 & 2) Science: Preparatory Series (Volumes 1 & 2), Summer Course 2023 Weekly Test (Volume 1) 2022 Weekly Test (Volumes 1 & 2) Social Studies: Preparatory Series (Volumes 1 & 2), Summer Course 2023 Weekly Test (Volume 1) 2022 Weekly Test (Volumes 1 & 2) Thank you for looking.