『Top Math Lite 3-1 (2020)』 is a textbook for the first semester of the third year of middle school mathematics. It systematically includes problem types of intermediate to advanced level, making it easy for students who want to solve problems of that level of difficulty to use it for their studies.
This is an essential homework textbook for learning the progress of all top-tier textbooks, and the author of "Top Math" personally selected and wrote the problems.