Google docs is far superior to Open Office in my opinion. Google docs is online and can be used from any computer vs. Open Office has to be downloaded to each computer you may be on. Google docs can be used to create presentations with slides, vectored drawings, spreadsheets, rich text documents. You can embed images, you can design web forms which allows you to store information. My son is the webmaster for his Boy Scout troop and uses these forms for camp sign up. You can upload any type of file at all.
Lastly you have the ability to truly collaborate and edit these Google docs in real time. This would be a boon for teachers planning together or students working on a project.