1. First of all, students briefly preview the contents of the textbook before each class, have a general understanding of the knowledge points to be learned, and mark the contents that they don't understand or don't understand during preview, which is convenient for students to ask questions in class and effectively solve students' learning problems.

2. Secondly, students must take notes frequently in class and "take the essence and discard the dross" according to what the teacher said. For solving mathematical problems, sometimes you can't just rely on your brain. Only through careful written calculation can we find the difficulties, master the solution methods and finally get the correct calculation results.