Congratulations on passing your exam.
I'm a little concerned about your question, because drills and exercises are not progressions. They're used to isolate particular movements or skills for students. Because they usually involve a fair amount of exaggeration they do not accurately depict “how to ski." For example, we might have a novice student bunny hop her skis up and down between turns to work on balance and stance, but you wouldn't want her to ski that way. Drills and exercises are great tools for solving a particular problem or strengthening a specific weakness exhibited by your student, but you have to keep it in that context or students become confused and think they should ski like that all the time. For instance, a skier who leans into the turn excessively can benefit by picking up the inside ski, but we’d do no one a favor if we gave the impression that skiing with the inside ski up in the air is “the way to ski.”
My suggestion to new instructors is to keep a notebook of exercises for different purposes that you can add to as you go. You'll often find that an exercise can be used many different ways by changing the focus.
Just about every book on skiing will contain a number of drills and exercises. I imagine the training materials used in your instructor training course brought up a number of drills and exercises for your students. Anyway, it's not the number of drills in your toolkit but how effectively you use them. A person can teach skiing quite well with just a few great drills. That said, I can't imagine teaching beginners and intermediates without the aid of the sidestep and herringbone, the straight run, walking out of a straight run to a stop, bunny hops, the traverse, uphill christy, the sideslip, falling leaf, the hockey slide, 1000 steps, leapers, and patience turns.
I recommend this book, which you can download for free: Brilliant Skiing, Every Day
paying special attention to Chapter 5. See also http://www.edgechange.com/tips/default.asp