Different schools learn at different speeds and get different numbers of textbooks. Senior one is called a compulsory book, and senior two is different from senior three. There are two elective books, A and B. Science A is a compulsory course for three years in high school. Elective courses are generally selected by the school from all elective textbooks for you to learn, and the rest are not selected, so you don't need to learn!

Mathematics in senior one refers to the mathematics learned in senior one, and the knowledge of mathematics in senior one is more, and the examination questions in senior one account for about 60% of the college entrance examination scores. You have to study five books in a school year. As long as you have a solid grasp of the mathematics in Grade One, Grade Two and Grade Three are only the review and supplement of Grade One.