Hit or be hit?

Ads complained to me a couple of times about how some kid (a year younger than him) was hitting him on the school bus. This same kid used to forcibly take his water bottle away and drink from it, leaving Ads with no water in the afternoons. I told Ads to take a firm line with this kid. I'm not sure whether he did so, but I had also told the bus didi to keep an eye out for such goings-on, and the problem seemed to get resolved.

Contrast this with a conversation I had with Y's class teacher recently. She says "Y has been hitting other children. This is a phase, many kids go through it. You should talk about it at home, make her understand through the medium of stories that it is not okay to hit or push other children. We will do the same here at school." I was like - WHAT???? How did my children get to be so different? One is getting hit (and bearing it like a saint, I must add) and the other one is pushing poor kids around with no provocation. Every afternoon, Y comes back from school with some story about "So-and-so pulled someone's shirt, someone pulled so-and-so's hair". What is clear is that one of the actors in this drama is herself, but with her current lack of knowledge on pronoun usage, I am not sure whether she is acting or reacting! (Sure hope it's the latter, I am so not looking forward to the next PTM!)

Then I stumbled upon this article. Boy, did it explain a lot!