2. For classic questions, senior high school students can arrange some classic questions that often appear every year into the wrong set. These classic questions are very representative, and I know what knowledge points are often easy to appear in every college entrance examination.
3. For the classification of the finale, there will be a finale math problem in the college entrance examination every year. High school students need to classify the questions of the finale, understand the reminders of each question, record these questions in a targeted manner, and record the ways in which each question frequently appears in the wrong book.