Have a look at the MLTA website.
I did the ML training course 18 months ago; at the time it was purely for personal development and I had no intention of going on to do the assessment, though I may now do so... haven't really decided.
I'd got over 30 'quality mountain days' in my logbook at the time I did the training, and had done some nav courses and had a fair amount of wildcamp experience. I hadn't at the time done much outdoor climbing, and perhaps as a result found the ropework a bit more challenging than some other aspects of the course. However, I think I benefitted more by coming into the course already with a fair amount of knowledge of many areas. The course taught me some new stuff, but perhaps more importantly increased my confidence that I did know a lot of stuff and was doing fairly ok.
The qualification is aimed squarely at taking groups into the hills, and my course included a fair amount of what I'd describe as aimed at DoE or similar youth groups (eg: big emphasis on Trangias in a session on outdoor cooking), so would probably be absolutely appropriate to your aims.
