To search for material about teaching drama, use the classic catalogue and search for drama study and teaching. (add either secondary or elementary to be more specific). The subject term college and school drama is also useful. Resources about, and for, teaching drama will be found both at the TFDL (primarily in the PN call number range) and in the Doucette library (call numbers 790-792).
A few example titles are below
... And don't forget that Doucette Library has so many great puppetsto borrow!
"Year after year, The Hobart Shakespeareans excel. They read passionately, far above their grade level; tackle algebra, and stage Shakespeare...Yet this takes place in Room 56, at a large urban public elementary school. All of the children at Hobart Elementary School qualify for free breakfast and lunch, and few speak English as a first language. Many are from poor or troubled families."
Source for scripts, librettos and licensing for musical theatre productions. Its Broadway Junior Collection® features 30 and 60 minute musicals for elementary and middle school-aged performers. MTI School Editions™ showcase musicals that have been annotated for performance by high school students.