When it comes to pop-psychology, the idea of an "intervention" seems to have taken particular hold on people's imaginations. I think that's what's at play here. The teacher seems to think that she can shock the child into realizing his faults and reforming. Much like reality show where a bunch of friends and family tearily confront a heroin addict.

Which just leaves out the problems that the child is five, possibly autistic, and not her child.