Hi Beccy
I'm new to this too, currently studying BSL Level 1. I have found an app called Sign BSL - it's like a dictionary of videos. You type the word you need the sign for and a couple of videos appear giving you the answers. I imagine it'll be great for conversing with your student.
You could also try looking at the Signature website. Give them a ring and they will tell you where you can go to learn in your area.
Hope this helps,
Andrea