When creating an assignment, you can require students to complete a peer review of another student's work.
Select Online Submissions from the Dropdown Menu
Only Online Submissions can be used for Peer Review
Choose how Hou Want to Assign Peer Reviews
You can determine if you want to  Manually Assign Peer Reviews or  have Ember Automatically Assign them.
How to Setup Automatically Assigned Peer Reviews
If you Automatically Assign Peer Reviews, the menu will expand. In the Reviews Per User field , enter the number of reviews each student will be required to complete. In the Assign Reviews field , use the calendar icon to select a due date or manually enter the due date for student peer reviews.
Note: The Due Date for the Peer Reviews must come after the assignment Due Date. If no Due Date is added, Ember will automatically assign the Review's due date to be the one of the Assignment
Save and Publish Your Assignment
If you are ready to publish your assignment, click the Save & Publish button . If you want to create a draft of your assignment and publish it later, click the Save button .