If we are going to face the truth about our national past, then perhaps perhaps this Cultural Literacy worksheet on Sally Hemings will be of some use in your classroom. I think most students would be very interested in the life of Sally Hemings–indeed, in her entire family.
Reading her story while revising this post brings to mind a great novel I read last autumn, In the Fall by Jeffrey Lent, which I cannot recommend highly enough.
If you find typos in this document, I would appreciate a notification. And, as always, if you find this material useful in your practice, I would be grateful to hear what you think of it. I seek your peer review.