Rogers and Hammerstein's
'Sound of Music', Gilbert and Sullivan's
'Pirates of Penzance' are two that immediately come to mind. Good memories...

I played bass trombone in our high school's senior pit orchestra for those musicals.
For the other two years, we did Rogers and Hammerstein's
'Oklahoma' and Gilbert and Sullivan's
'HMS Pinafore' 
We had a 120 piece 'audition only' full orchestra with a 500 seat auditorium and pit to perform in. That was in the late 1960's.

The best memory of high school was the music program that gave me the opportunity to experience those performances.
Sadly, in Canada at least, those opportunties seem to be lost.....

Where are the financial resources to promote these wonderful opportunities for high school students to present these awesome works to the public?

Cheers
allthumbs