Exactly.
If it "wasn't that bad" as the kid and his mum are making out, he'd prove it. Surely he would of had a photo taken with said purple hair.
Can only assume as there's no before picture, it was bright purple.
No, Isolation is basically, you're left in a room with a load of work to do all day, by yourself.
That's what it was at my school anyway. The teacher is probably making it sound better than "we stick them in a room with a load of books"