Look at it this way: as a drummer in most rock music, you're doing one of two things -- playing a beat, or playing a fill -- and much of the music is organized into groups of 2 and 4 bars. So, the next lesson could be to play fills with the basic 4/4 beat. Start with simple 1-beat fills (4 16ths on the snare, for example), and have him play the fill at the end of every two measures. Write it out, so that he can see how to transition from fill to beat and back, and phrase his playing in 2-measure chunks. From there, you can mess around with the placement of the 4 16th notes on the snare and toms to create new fills, and encourage him to make up his own variations.
After that, you can move on to longer, 2-beat fills (8 16th notes on the snare, for example), and explain how playing a larger fill means transitioning from the beat at an "earlier" moment, in order to maintain the 2-measure phrase.
Ove the next few weeks, and once he gets comfortable with two measure phrasing, move on to 4 measure phrases (with longer, one and two measure fills), and insist that he keep track of where he is at all times, counting out loud at first. At the same time, have him learn to create more interesting beats using different bass and snare patterns, and borrow from songs with which he is familiar where possible.
It will also help to have him practice from a beginning snare book (I like Vic Firth's Beginning Snare Drum Method book), to work on sticking, counting, keeping up with a metronome, and reading notation. Stick Control is of course a great resource, but it requires a lot of imagination to get something from it, and by itself, I dare say it's a bit dry and uninspiring.
