What are the effects of the "blue eyes/brown eyes" racism exercise? In the "blue eyes/brown eyes" exercise created by Jane Elliott in the 1960s, she divided a group of schoolchildren by eye color and characterized one of them (e.g., the blue eyed group) as an inferior group. The aim of the exercise is to show how racism works and how it feels to be discriminated against.

Is the exercise effective? What are the psychological consequences of it? Does the exercise still "work" today? What are the ethics when this exercise is done with adults or children?
In addition to the descriptions of these particular students, at the site mentioned above by Kate Gladstone and also shown a bit in the documentary (see https://en.wikipedia.org/wiki/Jane_Elliott)

You might consider what's known from the broader set of studies using this type of manipulation. This rich literature is valuable for your question because the Blue eyes/Brown eyes study was more a demonstration than a study and has not been repeated much (see https://en.wikipedia.org/wiki/Minimal_group_paradigm)