You just asked the right person. My children have been using the teaching materials of star education. First of all, this book is suitable for holiday self-study, pre-test preparation and after-school training. Secondly, it is no exaggeration to say that this book really interprets the teaching materials in a "nanny-like" way. The explanation is very comprehensive and detailed, which can make a child understand the whole textbook. More importantly, this book not only intimately analyzes the thinking of solving problems, but also points out the general methods of solving problems, summarizes examples that are easy to be confused and wrong, and provides answer templates to really help children master learning methods and improve their ability to solve problems!