A peer-review assignment enables students to comment on submitted assignments.
Click the Assignment link.
Click the Add Assignment button to create a new assignment.
Click the More Options button to create a peer reviewed assignment.
After selecting the submission types for the assignment, select the Require Peer Reviews checkbox.
Determine if you are going to Manually assign peer reviews [1] or Automatically assign peer reviews [2].
You can add the number of reviews per user [1] and when the reviews will be assigned [2]. You can automatically assign peer reviews.
Click the Save button.