I'm enrolled in my courses on mosiac (I changed some courses around during the break), but I have none of my courses shown up on avenue. Is this normal? Just wondering. Thanks.

Are you 100% sure that the prof uses avenue and not his own website or none at all?

positive

I'd say give it a few more days and if by the end of this week it still does not show up then email your profs.

They can sometimes take up to a week to show up on avenue if you have only recently enrolled in them.