When you’re reviewing a student submission, you’ll see a blue button to the left of the assignment that says “Comment.”

Click on it to leave a message for your student. Once you return their work, they will be able to see your comment.

There is also a toolbar at the top of the Review Submission page that has a pencil you can use to mark up your students work! You can even add stickers to your student’s submissions.

You can also comment anywhere on a student’s submission by clicking on the 'Add Text' button on your toolbar. 

Draw your text box and write a comment to your student on the notepad.