A music teacher Joan Martin Elementary school uses recorder karate in her classes. To make it easy for students to find the required music she has it all on her website. It appears that her students register for a google docs account and she gives them permission to view the music (Copyright issues would prohibit her from posting links to the music directly).
This is a great idea for you to think about in your classes as students can have access to what they need online at your website.
Do you use a website like this to communicate with your students? Has it been successful?