Mathematics in Beijing senior high school is also a sophomore. The reason why Beijing senior high school mathematics finished classes in Grade Two is mainly to give students enough time to study and consolidate knowledge points in order to get good grades in the college entrance examination. At the same time, finishing the class of Grade Two will also help students adapt to the review rhythm of Grade Three in advance and improve their learning efficiency. In addition, some high school mathematics knowledge points are more difficult and need more time for students to understand and master. Therefore, completing all the knowledge points of high school mathematics in Grade Two can help students digest and absorb better and make full preparations for reviewing for the exam in Grade Three.