Trying to learn Russian in the VHS

Just came back from my russian course in the VHS, which is the abbreviation of Volkshochschule and is somewhat like a school for adults. Today we were only four people out of ten. It's really a pity that most students have lost their interest quiet fast and have given up studying after only a few months, though this fact is not so bad for the remaining people. We're progressing very rapidly, but the problem could be that there won't be enough people for the next semester. I've borrowed a Russian slang dictionary from the library and it's really funny. Here's an excerpt: "Ты с ума сошёл?" (Have you gone mad?) or "Ты мне действуешь на нервы" (You're getting on my nerves). Well, these are just the unoffending phrases. Folks, believe me, you don't want to hear the other ones!