How to Read Braille Music is available through National Braille Press:
It's a great resource for just starting out.
Also check out Dancing Dots for Who's Afraid of Braille Music:
And be sure to download the Music Braille Code 2015:
You can also download the Introduction to Braille Music course book here:
Hope that helps! Good luck and amazing that you are going to learn braille music for your student!