Primary school is a child's initial stage, and I have been worried that he will lose at the starting line. Every time I see a problem with my child's homework, I sigh and don't know how to help.

Since I bought a sharp knife roll, I have gone from avoiding children's questions to giving them lectures on my own initiative. I know the test center of each unit of his three subjects every semester, and I can give him exams and answer them one by one. I answered all the questions my child wanted confidently, mainly the analysis of the sharp knife roll was very detailed, which really helped me a lot. You can ask me again if you don't understand.