If you want to have a good class, you must prepare lessons well, and the premise of preparing lessons well is to study the teaching materials carefully.

While delving into the textbook, we should first understand the knowledge mentioned in the textbook, put it into the whole knowledge system, and conduct all-round and multi-angle analysis and research, so as to truly grasp its content, understand its position in the whole textbook structure and understand its relationship with other knowledge. Understand the role of this part in this grade.

Seriously study the examples, exercises and classroom assignments of each class, and master the key and non-key contents of this class.