『Hydro-Powered Secondary Mathematics 3 (Part 1) (2019)』 is a textbook for the first semester of the third year of middle school mathematics course.
It contains easy problems that allow for easy application and understanding of concepts, and is structured to help students build a solid foundation in mathematics by solving problems through intensive, repetitive practice of basic concepts and calculation problems.
Additionally, you can review concepts that are easy to forget through concept check problems, and by solving unit summary problems, you can prepare for school exams by summarizing all concepts and types of each unit.