1 first of all, you should know the class, teaching building and time you want to listen to. College courses are not like middle school courses. A fixed classroom has a fixed teacher. Usually, one teacher is in charge of a part of this course. Some classes may be in different classrooms, and some classes will end when the time comes, unlike middle schools, which have this course from the beginning to the final exam. You'd better get the schedule of this course. Generally speaking, students who listen to this course will have it. You can ask them for a copy or make a copy.

2. Public lectures are usually posted on school display boards or billboards. Just listen to the class at the time and place notified. Some famous professors are often very popular when they come to give lectures, so they usually need to occupy seats in advance, otherwise it is common to stand and listen to lectures for hours.

3. In addition, be sure to look at your own curriculum. Only when you have no classes, you are advised to take other classes. Otherwise, you will fail in your own class and listen to other classes, but you will not be given an exam or a grade. Even if you get a result in the exam, it is invalid.