Although not a terribly new concept, there is quite a bit of literature out there that supports improved learning (and retention of knowledge) by students when they participating in creating questions for a quiz or exam. As this Chronicle.com article details, not just any question types will do. Multiple-choice questions rarely challenge the intellect of students. True/false are worse. As the article details, professor Max Teplitski wanted students to focus on higher-order cognitive processes. So he had them learn about Bloom’s Taxonomy too!