Although the amount of knowledge in primary school is not large, it needs to be digested and decomposed bit by bit. It is unrealistic to learn knowledge for four years in four months, unless you are a genius.

The correct way is, if you are in a hurry to make up, you can find the key points of learning in all grades, build a knowledge framework, sort it out bit by bit, and it is best to find one-on-one guidance from teachers.