Student-created test questions
You can use a glossary to collect test questions from your students. Have them create test questions based on the work that they've done in class, and submit each question as a glossary entry.
Set Approved by default to No, unless you want students to see the questions that their classmates submit. Also, turn off automatic linking for the test question glossary.
After your students have submitted enough questions, you can pick the best entries for an exam.