They actually do have school pricing, but you might want to try this out before really taking what you have learned to the next level.
Xtranormal allows students to create dialogue and direct characters in order to build a scene that is acted out...like a mini movie. My students really gained an appreciation for characters and setting while working with Xtranormal.
I'd highly recommend this for grades 4 and up and I see a lot of value to it at the middle school level. With characters like Crash Test Dummies, "Hello Kitty" styled animals and Manga figures, there's something for everyone. I am especially partial to "The Big Lebowski..."
The Basic edition is free and is a web-delivered app. Give it a shot...you'll be amazed at how you can incorporate this into your curriculum.