I fail to see the educational benefit of this exercise. I am pretty sure that just about anyone, including school children, can understand that slavery is probably "Not a Good Thing".
The only logic for this activity is to teach black students that they have a grudge, and white students that they should feel "generation guilt" about something that has been gone for more than 140 years.
As stated earlier in this thread by sinanju,
Slavery's bad, don't enslave people, M-m-m-m-kay?
Exactly. The progressive leftists that run academia seek to perpetuate the cycle of racism for yet another generation.