I would assume it would be legal to show Piazza in a classroom -- copyright law makes several exceptions for not-for-profit exhibition of a protected work if there's an educational purpose (though you might contact PBS to double check that).
Personally, though I think there are many other choices a high school class would find more appealing, Into the Woods, Little Shop, West Side Story, Chicago, 1776 et al
And you really should consider showing excerpts of the outstanding three-part PBS "Broadway -- The American Musical Series." It gives a concise yet entertaining history of the musical theatre from its origins to the present day, with special focus on the major composers, directors, and performers who were responsible for defining the genre. Also, the last episode is about Broadway today and includes a section on Wicked (with rehearsal footage of Chenoweth and Menzel) which would likely go over very well with the girls in the class.
"What a story........ everything but the bloodhounds snappin' at her rear end." -- Birdie
[http://margochanning.broadwayworld.com/]
"The Devil Be Hittin' Me" -- Whitney
Updated On: 7/24/06 at 01:09 PM