Reply To: Guitar only once a week!
If your students have guitars at home possibly you could set up a home practice schedule. How about an after school guitar club? You cannot accomplish very much very fast with the time constraint given to your guitar classes. Another thought is using the chord buddy http://chordbuddy.com/
It is an add-on system to a guitar where it basically turns your guitar into an autoharp. There are 4 buttons that when pressed will play a G C D and Em. Think of the number of tunes that can be played! I was skeptical but for non-musicians it gets them excited about playing music immediately.