Teachers cannot easily add images to assignments. This is very limiting! The Text item in class Bulletin boards has the ability to insert images (not in the most ideal way--we'd like to insert images "inline"--but this is better than nothing).
To go a bit further, all text boxes should be the same with the same features. I see at least 3 different ways of editing text (Bulletin Board Text, Topics Text, Assignment Description). These differences make the portal harder to use and harder to provide training.