"And my teachers would get so mad when they talked to me because I would look down - that's very respectful in Afghanistan. They'd say, "Look me in the eye when I talk to you!" There were a lot of cultural misunderstandings.

I cut and pasted the section above from the BBC article. As you can see Brock, teachers would get angry with this poor, little disabled kid. Obviously he is from a different culture, but he also could have been very shy or possibly even had asperger's syndrome or even a combination of things. He certainly must have had a lot of trauma from what he had experienced in Afghanistan. You don't teach children by using violence. As a teacher and especially one who teaches people from different cultures, you should have some understanding of who they are and why they might behave in the manner they do. To shout at a kid like that because he struggles to look at you indicates a lack of understanding and awareness.