I dont involve my lessons with stuff like this as it is a personal preference sort of thing <unless they ask>. It often serves to unecesssarily complicate and confuse. I am concerned about what's going on when everything gets into the slot..there are multiple proper means to that end. the precursor stuff really isnt so important provided what they are doing is relaxed and rhythmic and comfortable for them.
Volkl DNX9 - Legend17 m's / IsoProClassic x's