Oh, I had to do that to a certain bass guitar player. Actually, I made a small factsheet,something along the lines of "a crash course in music theory", I'll replicate it in a digital form fairly soon, but so far I can only point to this one site : http://musictheory.net

Sit your drummer through the lessons, but that site doesn't even mention counting when it comes to note durations, so you'll have to teach him to count yourself.

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