After creating an activity, you may need to edit or delete that activity. You can only edit or delete activities that you have created or made a copy of. This applies to Flipgrid, Custom, and Performance activities only.
Any edits that you make will not be applied to activities already assigned to students. If you wish to have students complete the revised activity, you should delete the assignment and assign the newly edited activity.
For Flipgrid activities, if you wish to make changes to the settings or activity instructions after the activity is assigned, you can do so directly through Flipgrid on your Resources page. See Edit Flipgrid Settings for details.
Click here for video instructions
You cannot delete an activity that is assigned to students. If you wish to completely delete an item, you must delete the assignment and then the activity.