Pretty good
As a first flash it was exellent, and I have no doubt you could be really good very soon, but it's not really fair to vote this higher just cause it's your first. I thought the jokes were good, but a lot of them were just too obvious and the style's been done to death.
That said it was entertaining and well animated. I realise that it was for a class project, but next time when you're free to choose the topic I'd advise not going for the 50s educational video style.