There are no good sitcoms anymore (except for Scrubs and the Office). I'm only 15 and I've figured that out.
Teachers is no exception. I watched every episode down until the end, optimistic that it would get better. Unfortunately, this was not the case. It had the nerve to call itself a sitcom, yet I found myself laughing about .5 times per episode. The timing on the actors' behalf was okay, but the jokes were predictable and lacked wit. In short: Teachers was just not funny.
The actors were decent but at times dull. As for writing, that wasn't all that great either, but the plots were usually okay. Oh well, at least the world only had to put up with 6 episodes.