Hello, I should call you brother, hehe ~ ~ ~ Senior two must learn mathematics: compulsory 5, elective 2- 1, elective 2-2, elective 2-3, elective 4-4, elective 4-5, you may not learn it until senior three, depending on the teaching progress of your school! By the way, math in Grade Two is very important. Solving triangles, series, derivatives, conic curves and probability statistics are very important contents, which are tested in the college entrance examination every year. Among them, series and conic curve are the most difficult, and both scores are 28 ... I also like math best. I hope I can help you more! I suggest borrowing books for preview in the summer vacation, but the number of questions at the beginning of the class must be enough, and you must ask the teacher more. It is also necessary to learn some extracurricular formulas and problem-solving skills! Come on! Hehe ~ ~ ~