There are many of reasons to have a list of students in each of your classes. If you’re a social learner or someone who needs to hear the ideas of others in order to stimulate analysis of data, you will want to create a study group before a large test. If you miss a class, you’ll know who to call to find out the assignment. If you forget your textbook, you’ll have options for borrowing one for the evening.
Whatever the possible reasons, you will want to have a good list of students in each of your classes, including phone numbers and maybe email addresses. Start collecting this valuable information on the first day of class. You’ll probably know some of the students already, so be sure to find out contact information. Continue collecting names for about a week. That gives you time to identify the really good students who can provide academic help if you need it.
Five or six contact names will be a valuable asset later in the semester.