Available for individual sale ⭕️ Price negotiation possible ⭕️ Please consult in the comments. [Overview] This educational material is structured in a 4-STEP format for learning fundamental mathematical concepts. There are three levels: A, B, and II, allowing for progressive learning. [Target Audience] Designed to support mathematics learning for junior high and high school students. It covers a wide range of topics from basic to advanced, making it ideal for self-study. As shown in the second image and beyond, there are writings in the problem sections. There are no writings that affect solving, such as calculation formulas. * Due to personal inspection, there is a possibility of oversight. There are no noticeable stains, but please purchase with the understanding that this is a used item.