All high school teachers tend to say things about college and college professors. Things like your college professor won't accept this, your college professor won't let you into class when they don't actually know. All college professors are different along with all high school teachers but, here's some of the things I've learned about college professors that your high school teachers tell you aren't true, or don't tell you at all.
1. Your college professors have bad days also.
There are some days they don't want to be in class as much as you do. Sometimes they have had a bad day, sometimes the last place they want to be is in class. So just take it easy on them, they're humans also.
2. Using swear words
Your college professors will cuss in front of you, in front of the class. It's just something they do.
3. Coming in late to class
They do it just like you do sometimes, they will walk in 5-10 minutes late sometimes. They also let you walk in late, so not much you can say or do about it.
4. Actually help you
Office hours, go to them, you can get the help you need. You can go to them for just about anything especially during office hours, whether just to chat or get help in class. Take advantage of this.
5. Understanding you are a college student
They tend to get why you go out and understand that you do indeed sometimes go out. They aren't dumb and they understand what you do on the weekends and even sometimes the weekdays and they won't shame you for it.
6. Let you out of class early just because
On someday's professors don't have enough material for a full class or they can see how restless you are and don't want to continue teaching, so they let you leave.
7. Let you come into class late
Most of the time if you come to class late, you just slip in quietly, find your seat and sit down without a word said to you.
College is not really anything someone can explain to you, considering everyone including every professor and university is different. But, your professors are mostly there to help you succeed as well as most things around the university, and you should use all these things in order to fulfill your college career.