Disagree with jheem over the inclusion of so many words from the plays in the OED simply because they were in Shakespeare's opera.

Dr Johnson was part of the problem, but the availability of some concordances of Shakespeare's works made the editor's task easier. I based my suggestion on a partially digested and half remembered reading of the fourth chapter (Shakespeare's Dictionary) of John Willinsky's enjoyable book Empire of Words: The Reign of the OED (pp. 57-75).

You should let your students see "Shakespeare in Love".

Yes, indeed, a fun movie. There's also a short scene in Last Action Hero with Joan Plowright (Laurence Olivier's widow) as a high school English teacher showing a scene from her husband's Hamlet before it gets re-image-ined by the lead kid. The look on her face, when she says they may remember him from some commercials he did, is priceless.