Power Point offers description of characters Glinda, Dorothy, OZ, Tin Woodman, Lion, and Scarecrow.
I used this in my unit of early American Musical Theater. You can find the script to the 1903 musical online through a Google search. After reading the script and studying the 1903 versions of the characters and reading the 1903 script, we watched the 1939 movie and compared the differences.
I couldn't believe how many students have NEVER seen The Wizard of Oz, and what they did know they have picked up from "Wicked." These were mostly upperclassman high school students and they loved it.