Glossary

Another idea just came to me...
If you have a biology teacher and a history teacher both using the same installation, and they both want to edit the terms in the glossary module, why not just create separate language packs?
If you are using the "en" language pack, then make some copies, change as many terms as you like in the files, and then save the new language packs as "biology" and "history". Then, in the "Course Settings" page, use the "Force Language" option to apply the proper terms to each course.
This may cause issues if there is a global glossary on the main page, but it seems like a simple solution. Editing the language files is not too difficult. I was able to change mine is less than five minutes.