Here is a great play for the classroom , I wrote it based on the story "The little mole" Find the video book in our A/V player or in videos....
Also some other short plays.
THIS SITE has a long list of free copiable scripts for kids. Find one you like and modify as needed for ESL / EFL. Find some reader's theatre scripts HERE.
These two "young theatre" plays are really nice and would be easy for teachers to organize and perform.
1. Iggy Peck - a perfect story about a boy who wants to be an architect despite his teacher.
2. Dr. Ted - funny story about becoming a doctor