Letter Feed Messenger is a Google Documents and Google Sheets Add-on designed to make easier to keep up with the changes in your Documents and Sheets. Rather than having to open the revision history to see changes or open the comments to see suggested edits, Letter Feed Messenger puts all of that information and more into a column on the side of your Document or Sheet. The video below provides a short overview of Letter Feed Messenger's features.
Applications for Education
Using Letter Feed Messenger could help you save time when editing a student's work. Rather than having to search for changes you can jump right to them by using the column of updates created by Letter Feed Messenger.