Step 1: Be able to understand the content of the class, but not complete it in class.
Most students, in class, have a much better view of themselves than the top students, and they tend to absorb passively and rarely think independently, that is, when the teacher leads them to a complex place, they find that they seem to understand everything.
But the top students do not have such self-confidence, they are always able to keep up with the teacher's train of thought, from one inference to the next, from one inference to another, their thinking is not limited to the right path, but how you can find the right path in the complex branches, and then deduce such inferences, which is the transformation of substitution to independent thinking.
Stage 2: Expand on similar problems by reflecting on the way you think about solving the problem.
When a variable changes, they usually do not do any review after class, nor do they pay too much attention to the homework assigned by the teacher, and their main energy is still on the understanding and mastery of their own ideas and methods, rather than simply focusing on learning and mastering their own ideas, rather than putting all their energy on learning and learning.
For the average high school student, they prefer to use the training method, they will often hear something in class, but after class, they will not do it, this is because they have not yet formed their own thinking, so, they will ignore the thinking process, but use a simpler model to guide them, so that they can get the maximum score at their own level. However, as students' knowledge systems become more complex and difficult, the negative effects of students become more pronounced.
The third step is to continue to expand the ideas in the process of solving the problem, and gradually build the advantages of dimensionality reduction strikes.
Many times, each question will make their strength to the next level, and the more complex the question, their thinking ability will be stronger than others.