Google Apps
"Overview of Comments and Discussions
We've launched a new style of commenting in Google Documents. Just like before, you can easily insert comments into a document. With comment threads called discussions you also can also keep track of comments, target your comments at specific people, and respond to and follow comments and document updates from your email inbox."
Google Apps Marketplace EDU
Third-Party Applications
Aviary is a suite of creative tools. There are currently six editors including image and audio editors.
Our applications run on your browser and allow you to store and access your work from any computer. With Aviary there is no expensive software to buy or maintain.
Use Aviary to create, modify and share your work- from graphic designs to audio files- easily and effectively.
Aviary integrates seamlessly with Google Apps to let your users share and edit documents directly from the Google Docs interface.
"Grockit provides a decent service at a reasonable price for the math and writing sections of the SAT, but it falls short on the reading comprehension questions. Since the infrastructure is quite good, a little quality control on content would go a long way towards improving the product in all three subjects. Grockit is not a suitable substitute for assiduous Blue Book work, but if you're looking for a low-cost, fun way to get some extra math and writing practice, you could do worse. Stay away from Grockit's reading comprehension practice."
"Google Cloud Connect for Microsoft Office brings collaborative multi-person editing to the familiar Microsoft® Office experience. You can share, backup, and simultaneously edit Microsoft Word, PowerPoint®, and Excel® documents with coworkers. "