Here's a bit of reference material for the guitar student. Guitar Basics features some simple notation and fretboard diagrams to help get familiar with the instrument. Available in common keys C and G Major.
UPDATE: Now featuring a version for the lefties out there!
This worksheet introduces 16th-note syncopation on the bass drum, picking up where Rock Basics II left off.
Here's a couple of worksheets that I use with private drum students. It breaks down playing a basic rock beat on the drum set, and advances with some more developed coordination and rhythmic variations.