Korea Exchange Student or Korea Visiting Professor?

So last night I was sitting in my room minding my own business when one of the other guys in the dorm comes to me telling me about the English class he wants me to teach. He didn't know English very well but after about ten minutes of fumbling through words I finally make out what he was trying to say. He told me that the class was going to be on tomorrow (Wednesday) at 5:30. I said ok, and went to back to whatever I was doing. Now mind you, people have been telling me about this class for a while now, so it wasn't a surprise, I just didn't know when it was suppose to be.
After a couple hours go by, another student who can't speak English well came to me and after fumbling over his words, I found out he's telling me that the English class that I'm teaching is down stairs in the classroom waiting on me. I'm was like there must be some mistake. Another guy just came in here and told me it was tomorrow. Then it hit me. It was two different classes. Before long, I'm going to be teaching about as many classes as I'm already taking.