SpeedGrader allows you to view and grade student assignment submissions in one place.
Some document assignments can be marked up for feedback directly within the submission. You can also provide feedback to your students with text or media comments.

Examples of Usage

Give feedback to assignments
Give feedback and comments directly within the submissions
See submissions and URKUND-results

"524 - SpeedGrader™ Overview" from Canvas LMS on CC BY-NC-ND 3.0.

How do I leave feedback comments for student submissions in SpeedGrader? (external link)

Try it yourself:

From the previous exercise there is now a submitted assignment from the Test student available for grading.

Open the assignment in SpeedGrader
Test the various tools for commenting and leave feedback on the assignment. Also, record a media comment.
Enter Student View and watch the feedback given by the test student. Comment as a stduent as well.
Leave student view.