Bitsrips is a comic creation site that is one of the better ones to come around in a long time. Like most similar sites a user selects a character, background, object, and then provides the text, but what separates this from others is there is an educational portal similar to Toon Doo Spaces. This is great for teachers as there is built in filtering, content approval before posting, and private hosting.
I highly recommend checking out Bitstrips for creating comics in the classroom!!!!
Thanks to the excellent blog Life Feast for the tip!!!