At the end of Romeo and Juliet, my students choose a 20 line passage to memorize from the play. They freak out at first, but they are so proud of themselves for having to done it at the end. Years later, my students come back to tell me they still know their lines :)
I also offer extra credit for students that want to go the extra mile and act it out, which is always fun.
Assignment file includes directions for the students and a scoring sheet for you on the day of recitations.