College mathematics is different from high school mathematics. Senior high school mathematics books are published by publishing houses, which are a set of teaching materials as a whole, but universities are not. Freshmen study advanced mathematics, which is the subject of most science and engineering majors. Later, when I was a sophomore and a junior, I had to learn different mathematical knowledge according to different majors and schools, such as mathematical analysis, complex variable function, operational research, statistics and probability, linear algebra, discrete mathematics and so on. It all depends on what kind of knowledge your major needs. English should be studied in both freshmen and sophomores, because some students only take CET-4 and CET-6 in their sophomores. University study is still the most important. It's not as easy as some people say when you go to college (our teacher always said this in senior three). After all, it is much bigger than your high school. People from all corners of the country study better than you. If you don't study, be prepared to fall behind. How to learn in college? Let's talk about some common science and engineering (although you have explained that you are an engineering student, you should know that there are dozens of engineering majors, each of which is different, and you can't say for sure how to do it). Common methods for all majors: attending classes and doing homework after class, yes or no. You must pass CET-4 and CET-6, which is linked to the graduation certificate. Memorizing words for half an hour every morning is enough. Advanced mathematics, study hard, all kinds of mathematics are related to it. By the way, it's best to cultivate a personal hobby in college and learn it well. This is good for you. My classmates study art, music, software, websites and the library every day.