Yes definately some advice and I think this is sooooooo overlooked by teachers for new students....
Explain WHY he is doing everything and what position he is trying to get to!!
EX. has the guard and you are doing an armbar, thats fine teach him and let him practice but make sure he knows that from the guard he is either looking to sweep or submit and that the guy inside the guard is going to be looking to sit up and escape and get to his side mount. WAY too often I see new people put on a drill and they have NO CLUE why they are doing it or how it is going to help them.
You will capture his interest much more if he understand WHY he is doing everything not just WHAT he is doing! Good luck!
Well he had a good time. He only did no gi, and learned a few takedowns and some counters. The last 20 minutes or so were open mat, and I showed him a bunch of moves. Then we rolled a little bit. I'd put him in a shitty situation and then show him how to get out of it.