In mathematics, to be honest, you are a little early to use this in grade two, and you want to improve your mathematics. If you are good at math now, you can use this. But if it is not very good, I suggest you use the whole product first, lay a good foundation in winter vacation, and then use it next semester in Grade Two. If you are good at it, you can use it to start school in senior three. Of course, you must eat it thoroughly, and then in senior three, in addition to reviewing with the teacher, you have to do the college entrance examination questions. Be sure to do the real questions. When you have done all this, there will be no problem. But remember, the college entrance examination should know how to choose, and you must not work hard on the questions that you can't drill through, which will make a big loss. After all, it is a big problem to choose three points at the same time. If you can do well, high marks won't be a problem ~