So, recently, Rob of http://www.musicteachingresources.com & http://www.teachwombat.com invited me to check out some materials he's put together to help make the music teacher's life easier!
Essentially what he's got is an organized set of worksheets covering the fundamentals of scales and chords that can be printed out or easily transferred to a thumb drive at your leisure.
Some of the sheets are explanatory in nature, illustrating things such as major scale construction or diatonic harmony (which chords are minor/major within the scale). Some of them are worksheets that require the student to construct a scale or chords or to go through the chords within a scale. Some of those worksheets have a diagram of a keyboard on them, some don't.
The files all come in labeled folders, and some of them even allow the teacher to fill in the blank to determine what scale or chord the student will build. Essentially, it's like having a portable music theory workbook, which you can draw from as needed.
My favorite thing about the set is the inclusion of the blues scale, minor/major pentatonic scales. My only criticisms would be that the chords don't go beyond 7th chords & that the Dorian mode is included, but not any of the other modes, making the set not overly helpful for jazz students.
All in all, I think this is a pretty neat/handy set of resources, especially for $18 - can't go wrong with that. I can see myself getting a lot of use out of this with students on any instrument. Head over to http://www.musicteachingresources.com and check out what he's got.