Imagine you are an american indian student returning from a year at one of these schools. you decide to write a letter explaining why no more children should be sent to the white boarding schools. what arguments would you make and how?

I don't know if this is completely right, but I might be close. You could say that most American Indian students wouldn't get the same equal treatment as white students, and might be treated differently from the other students. I don't know what you mean by "one of these schools" but I'm guessing it was back then during a time of minority rights movements. I would just stress on the fact that they were denied a lot more rights and not treated equally.