QUOTE(elmo @ Mar 11 2006, 04:18 PM)

See, I'm not a teacher, I'm an 18 year old doing a placement to "inspire younger less able and motivated children to want to go to uni". So I sort of do classroom assistant stuff, and occasionally get left with kids to menotr/tutor. So I didn't know what to do, since I'm not allowed to give out detentions, but am allowed to yell at them, and I got left with a music class of 20, lots of musical equipment and 2/3 fighting lads!
I think you know the answer yourself here....
...I think the word 'exploitation' comes to mind.
If your work is voluntary and you are not being paid, then if the teacher left their class 'unattended' ( which, basically they were doing) then that's their problem not yours.
Don't give the matter any more thought.
You were absolutely right to do nothing, in my opinion....the teacher is in charge...let them make the difficult decisions. You should be enjoying yourself.
If things get tricky and you are being left with the class alot, speak to your immediate superior...probably someone at Uni who gave you the placement. In fact, I'd definitely have a chat with them about this incident anyway.
If I'm reading this situation right...it sounds to me like the teacher is using you for a free child-minding service. This is not uncommon...so be careful.
Good luck!