*The listed price is for one book. Please let us know which book you would like after purchasing. * These are new and unread items. They were purchased at a school about 5 years ago and have been stored at home. All books are unused, and there are two copies of 4B. The progression is A (practice book) followed by B (course book) (e.g., 3A → 3B → 4A). For your reference, I have included photos of pages from 4B and 3A, as well as the table of contents for all books. There are no bent or used pages. (As the paper may feel a bit old, I am offering them at a lower price. The original price was around 5000 yen.) World-Class Educational Approach: Incorporates teaching methods from countries that consistently rank high in international academic assessments (TIMSS, PISA). In particular, it is based on Singapore's excellent mathematics education, developed in collaboration with the Singapore Ministry of Education. Structure: Designed as a program for elementary school students, each grade level consists of two books: "A" and "B." Primarily aimed at elementary school students, the goal is to deepen conceptual understanding rather than mere memorization or rote repetition of procedures. --- "Prime Mathematics" Core curriculum mathematics program based on the best teaching practices of top-performing Singapore, Republic of Korea, and Hong Kong. Developed in collaboration with the Singapore Ministry of Education, its proven approach and consistent lesson design create a powerful learning ecosystem for premier instruction. Issued by Scholastic Education International (Singapore) Pte Ltd The organization and scope of these concise homework-help guides make them an essential reference resource. --- English Mathematics International