If you are trying to show a group of children about discrimination and you deliberately design set rules for the children to follow, knowing which things would make the children feel uneasy and knowing which things would (punish) children, that have done nothing wrong, how can you then be suprised at the result? Sounds to me as though the teacher needed a lesson more then the children. This did not show anything other then how the abuse of authority can lead to undesired results (sickly enough, this was a desired result and deliberate manipulation.

The use of statistics is well over rated, is poorly delivered and the biggest cause bias and discrimination. Reporting findings as fact is pure wrong.