"Create presentations together. Google Docs lets you create, share and collaborate on presentations with others. Go to http://docs.google.com to give it a try."
Demo video
"Read & Write is a free Google Chrome Web App that increases the accessibility of the text of documents in your Google Drive account. After installing the app you will see a Read & Write tab appear at the top of your browser window whenever you have a document open in Google Drive. Clicking that Read & Write tab will open a menu of accessibility options"
"Dr. Mark Wagner published a blog post that includes directions for creating formulas that will result in quizzes created in Google Docs forms being self-graded. His post includes a video screencast and slides."