While it is not that big a deal to have these things as aprt of a black history ceelebration, I was happy with the way we were able to integrate these things, creating something not terribly unlike what I invision the origin of theatre having been. With this in mind, we move to the next experiment. Not only does this start with a well-written introduction, but the references and notes in the frames form make finding the sources easy. I usually skip the notes, reading them only when absolutely necessary, but the notes presented in this frames format makes working with them very easy. Seeing the play is still better, but this is the best place to read it.
Some notes seem more relevant than others, but the frames format reduces the frustration.
Perseus Perseus knows Sophocles. The classical information source explains the opinions and tales about Sophocles, as told by his contemporaries and posthumous admirers. GradeSaver I am impressed with the abundance of quick information at GradeSaver. While the information here does not have the depth of dissertation, it does go deeper than Cliff Notes. I don't really know where they got their ideas, since there are few citations, but I would suggest reading this page before tackling the text.