http://www.geocities.com/frankie_meehan/TextComment.htm (this one is not specifically about the text but have to analyse texts, however, it is not specific to plays).
http://22.214.171.124/~leist/studies/...ing%20Rita.doc (this website has questions on the text and answers to them. Maybe slightly helpful).
Thats about it. If you type in "analysing Educating Rita" into google, you get quite a few results. It just depends on how useful they are to your specific course. Hope some of it helps anyway.