If you don't live in school, you may be stopped by security guards wearing slippers; If you live in a university, you can go directly to the classroom. Teachers generally don't care what shoes you wear. More often, the teacher won't notice what shoes you are wearing at all, but the students near your seat can definitely see them. If there is no reason your classmates know, you will wear slippers to class. I wonder if there will be any students behind your back. After all, although universities say there is no strict dress code, they are still a semi-society. As an adult (or about to become an adult), therefore, if there is no special reason, it is not recommended to wear slippers to college. Of course, there is nothing wrong with wearing slippers to class.