"And so on and so forth" was a favourite with one of my teachers, too. Another one used to be "Obviously" coming before ot after every sentence, which was really quite belittling if you hadn't realised what had been said prior.
My Biology teacher at GCSE used to have an example for everything when he was explaining things. Some of the examples were really funny and I couldn't help but laugh every time they were said. Some of the other students in that class hated him and his examples, but I remembered about the rabbits I allegedly acquired during GCSE Biology when doing the exam, amongst other things! When someone would ask to borrow some stationary, he'd always say, "Haven't you got any friends to borrow a pencil from?", "We're all friends in this room, I am sure you can ask one of them..." etc.
