Stride Labs is a service that helps you keep track of changes to documents in your Google Drive, Box, and Dropbox accounts. Rather than having to open a document and look at the revision history or the comments, Stride will notify you of updates to your documents.
Within your Stride Labs account you can create project folders to help you better track updates to your files. For example, a teacher could create a project folder for each section of a class that he or she teaches. Likewise, students can create project folders for each of their classes.
Stride Labs offers an iOS app through which you can receive notifications. You can also use Stride Labs directly in your web browser.
Applications for Education
Stride Labs could be a great service for teachers and students who are not in a Google Apps for Education domain. Stride Labs supports Dropbox and Box as well as Google Drive. In that sense, it provides something for almost everyone.