1. Some school exercises in top junior high schools in Yunnan are from this book. We can lay a good foundation and expand it appropriately. All grades 6-9.

2. In addition to one lesson and one practice, mathematics teaching AIDS also have a complete set of teaching material solutions. This book is the most classic.

3. Many questions in the class are the finale of foreign senior high school entrance examination, which is very difficult. Therefore, it will be very simple to finish reading this book and then make one or two modules.