RE: Accomodation for the Deaf
That's a great way to get the stick movements across!
Another technique that you might consider is the Ragland Technique. Very simply, the instructor pinches the right stick with his right thumb and forefinger and the student puts his hand over the instructors and uses his thumb on top the stick. This technique can eliminate the buddy box for "early" training and gives the student instant feedback on the required movements.
This technique also works well for "stick slammers" because it gets them to "feel" how much movement is required.
After the student "masters" each stage, (turns, takeoffs, landings etc) then the buddy box is used to continue that lesson. The benefit from this technique is that "trial and error" is eliminated and the student gets the actual "feel" for required stick movements.
Congrats on Your Training Program!!
Greg Shane
N Little Rock, Arkansas