On a recent peer obs i had a comment when computer training that I wasn't considering those who had prior knowledge or were quick I must admit I like the idea of some kind of device to handle those that are off and running ahead of the others. but sometimes it is difficult to manage. I sometimes had the "what do we do now" questions while waiting for me to go round and fix up and catch up those that either didn’t listen or didn’t understand or made a mistake in the process. I used to just make them wait until everyone had caught up. As I say It’s difficult if you are teaching something in a series where you need to get to one plateau before you start to move onto others and also those that steam on ahead are often difficult to pull back and continue. If you have any good idea I'd be interested.