Listen carefully and practice after class. Many people say that marine technology is unscientific. In fact, that's the best way, but a lot of exercises are not enough. We should also do a set of wrong questions and do them often and repeatedly. Don't ask questions immediately when you don't understand, think for yourself first. I really can't figure it out You should sum up what you don't want to understand, ask the teacher pertinently, and often sum up the methods. Doing more questions is to improve your proficiency. Although you can do a lot of problems by yourself, you should start to calculate and make sure that every step can be considered comprehensively, which will reduce your mistakes in the exam. In fact, it is mainly listening to lectures, doing problems, thinking, summarizing and calculating. hope this helps