Hi Jon, and welcome to Tikiwiki community!
Have a look at Aulawiki for tiki 2.x: Mod AulaWiki
In tiki 3.x, the mod has some unresolved minor issues, and it can be also used with some care to avoid the issues. If you want to use it for education, you'd better stay at tiki 2.x for a while and use it in conjuction with Aulawiki & its workspaces. They were designed specifically for what you are looking for.
See also: http://edu.tikiwiki.org and join us there too!
(it's a site on a extremely slow server on shared hosting, however, take you time while loading edu.tw.o - that site needs to be migrated)