Technology and music is a huge area for growth as far as music teaching goes. I recently transformed my old office laptop into a music computer lab.
I downloaded various cool (and free) apps from Ubuntu's software center, including:
Score Reading Trainer
GNU Denemo
GNU Solfege
Hydrogen Drum Machine
Linux Multimedia Studio
Virtual Midi Piano Keyboard
Generally, I zoomed in on apps that help students with note reading practice, ear training and rhythm work. The music notation software and audio recording software is to give them something fun to create.
One student was tickled pink that he earned three Maestro Bucks for creating a funky drum loop (and tutored his sister on how to use the program).