This year I'm going to focus on Google Applications - aka Google Apps, such as gmail, docs, slides, sheets, etc.
One of the best features in Google Apps is Revision history. All of the apps include a "revision history" feature. It is a running list of ALL the changes made since the document was started. This is attached to the document, not the user, so every user who updates the document has their revisions included in this list.
It makes it incredibly easy for a group to see who’s contributed to a project and teachers can check student progress on an assignment.
The revision history feature is located under the 'File" button. You can choose to keep the original version or revert to a previous version. You never have to worry about lost work and you can see who is making changes to the document.
The example on the right is a snapshot of the spreadsheet used to reserve library and lab space.
Please email or stop by if you want to review how to use this or any other feature in Google Apps.