One of the best parts about Google Docs is that it is free. It has all the things you will need in order to build and administer an interactive lesson for free. Here is a great way to use Google Docs to teach writing ( video below ). In fact it is not only about teaching writing but teaching collaborative writing. You will get to see how students can work collaboratively in drafting their writings by using the free features Google Docs provides for them.
See on www.educatorstechnology.com