A) Someone mentioned that the setting of mathematics and physics is a headache and it is difficult to start. In fact, as long as you grasp the main line of each chapter and step by step, your grades can be improved quickly.

B) Don't do too many questions. Understand every formula problem thoroughly and use it flexibly, instead of doing many problems. Doing a lot of problems will give you an illusion and a lot of knowledge. Actually, there is no problem at all.

2. Preview in advance is helpful to improve learning efficiency.

Understand the role of preview in advance. Why preview in advance? Some people are absent-minded as soon as class begins. There are two reasons: first, the teacher can't understand what he said, and second, he doesn't know the key points. Preview in advance can let you know what you won't do, and then make a mark. When the teacher speaks, it will make you suddenly realize that you have a deep memory and will never be distracted.

3. Master the concept and deduce the formula.

A) For example, when learning "function", first define the concept of function, and then integrate the concepts extended from function.

B) For all important mathematical formulas, it is necessary to find out how this formula is derived and what are the conditions for applying the formula. Get into the habit of deducing formulas. Only by understanding the ins and outs of the formula can we use the formula better.