Log your classes schedule and refer back to it in case you ever forget or want to tell someone.
If you add friends, Class Times can answer these types of questions: "What time do you have class?" "Do you work on Wednesday?" "What classes are you taking?" "What time do you do in on Tuesday?" "What time do you get out of work?" "Are you in class right now?"
Works hand-in-hand (integrated) with Work Times for those with work schedules; You can request friends from both apps and only have one.