It could be used in an ethics class! Too many people look at the Trek stories and shows as "just science fiction" but Gene Rodenberry had much more in mind. This episode stayed true to Rodenberry's vision and made us think and question. It looked at themes of Civil Rights and Slavery.. it looked at ethics, morality and science all intermingling.
There was some excellent acting in this one. Whoopi Goldberg, Diana Muldaur, Patrick Stewart & Brent Spiner all played their prospective roles particularly well. But, in my opinion, it was the character of Riker that played the most difficult role in this story and Jonathan Frakes pulled it off excellently!
The character of Lt. Commander Data, the android crew member, was an ingenious invention of the Next Generation writers. Each time they explored his character the more interesting he became. This story, by Melinda M. Snodgrass, however, is the best of those explorations of character. It could be used in an ethics class! It is a definite "must see!"