Google Documents allows you to write your papers for class online anywhere in the world. Because the documents are stored online you don't ever have to worry about losing your paper or having the disk that it is stored on go corrupt. Google also auto saves your documents for you so you don't have to worry about forgetting to save that ever so important term paper. You can also upload existing documents (from almost any format) into any of the three types of supported documents.
For help using Google documents, visit Google docs help or email your questions to firstname.lastname@example.org
Here's a mildly informative video from Google in which they brag about how much Google Docs "rocks":