Important Note: On your Resources page you will also see an option to Remove Item. If you use this option, the assignment and any grades associated with it will no longer show in your gradebook. For more information, see the help article How do I delete and restore a Read & Practice resource?.
You can unassign an activity from the Overview page or the Resources page. Click the three dots icon (...) to the right of the activity you want to unassign, then click Unassign Item.