You can ask questions. You should ask action oriented questions. Tell a student you want him to be able to demonstrate the dive, both verbally and physically, without any coaching from you. Question content is important too. There are many levels you can question on.
Questions can test memory, applications and evaluations.
Memorization of facts and concepts is a prerequisite of all other higher levels of learning. For example, students must remember the exit count. Other things students should remember and recall in a heartbeat, include pull altitude, the be under the canopy you're going to land altitude, the number of times he should pull on a hard pull or go for a floater, sequence of pulling handles, location of handles . The next level of questioning is translation. A student must express his responses in his own words.