Moodle glossaries are great, and there are so many ways to use them. Content can include everything from vocabulary to FAQs to fact-of-the-day to picture story starters. You can build them yourself as a teacher or have students build them.
This is a different kind of post for me… I’m really thinking out loud and looking for folks more knowledgeable than me to make suggestions. I’m working on an OER project plan to develop open “textbooks” (collections of resources with