1. Synchronous learning refers to books that are synchronized with the contents of textbooks to assist and guide learning. Such as synchronous exercises, quizzes, etc.
2. Chapter exercises are guidance books for a certain stage or learning section, such as chapter detection and stage test.
3. Mid-term and final exercises refer to a comprehensive examination of students' understanding of what they have learned through a period of study. Each year is divided into two academic years, called last semester and next semester.
Last semester started from September 1 to the end of winter vacation, and next semester started from March 1 to the end of summer vacation. The middle stage of last semester is called the middle stage, and the final stage is called the final stage. At the middle and end of each semester, the teacher will examine the students' knowledge according to the actual situation. Such as: mid-term and final papers, year-end exams, etc.