Great Barrier Reef (Liveaboard I)
My 2.5 week divemaster course consisted of theory (classroom sessions) and practical application (pool and ocean sessions). Specifically the theory involved studying stuff like dive physics, physiology, and tables whereas in the practical application, I primarily assisted instructors with the teaching of entry-level Open Water scuba courses.
I assisted with two Open Water courses from start to finish. Each Open Water course was four days: the first two days were spent in the pool learning the 20 basic Open Water scuba skills, and the second two were spent on the Great Barrier Reef refining scuba skills in the ocean (i.e., open water).
The open water portion of the Open Water course was conducted on a 3 day/2 night liveaboard trip to the Great Barrier Reef. In brief, the liveaboard trips included lots of diving (up to 11 dives for certified divers), plenty of sun, and all the food you could eat. Since I was primarily being evaluated on my divemaster duties over two Open Water courses, that meant I got to go on two liveaboard trips. 
On each liveaboard trip I was evaluated both in and out of the water. In the water I assisted with Open Water and Advanced Open Water courses, and out of the water I helped out with deck duties such as logging divers in and out of the water and filling tanks. In other words, the practical application involved the actual duties of a divemaster, and take it from me that you certainly learn by doing! Here are a few photos from the first liveaboard trip.
