Last week Google made an announcement which seems to be long overdue. For a while, comments have been something available in Google documents but not in spreadsheets. This is no longer the case. The next time you are working with a Google spreadsheet or the results of a Google form, you will see the ability to add comments as well as include notes for single cells. These two features are very useful and easily applied. To add a comment to a cell, choose Comment from the Insert menu. To add a note, it's the same process but instead choose Note. A comment is denoted by a yellow triangle in the top right hand corner of the cell while a note is represented by a black triangle. In addition, a cool feature is the ability to comment directly to another user by typing a plus sign followed by their email address, like this: +firstname.lastname@example.org. That person will then receive an email with your comment.
Creating a conversation in spreadsheets allows multiple users the opportunity to discuss the results or add notes for other users to view. This is a great way to increase collaboration among students who are working on a shared document or spreadsheet.