Edubuntu has a default guest account that students can use without being able to destroy anything. I'm trying to change the items displayed by default in the Unity launcher, but I'm not sure how to do it.

Any changes made from inside the guest account are reset on logout/login (as expected, that's the point of the guest account). The special Edubuntu menu editing tools appear to be designed for Gnome2-style menus only.

(It would perhaps be better to phrase the question more generally as "how do I change things in an Edubuntu guest account?", but I thought I'd start out with something more specific.)