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"Elizabeth Aries explores the insights she gained by studying four groups of students at Amherst College: affluent white students, affluent black students, white students without a lot of money and black students without a lot of money."
 
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Typically, when I want to use a student's work that s/he handed in as an assignment for one of my classes in another context, I email the student to ask for his/her permission.
Nice article by Delaney J. Kirk and Timothy L.
Grades are all over the place, but what are they?  Well, I guess there are a few questions.  What is a grade?  What is the grade supposed to be?  Why do we give grades?
You know you want to!  This is just one of the many project you can help out: