Skipping an Activity
You can skip and un-skip a Lesson Activity, by clicking and dragging the 
icon at the bottom of the tile. Dragging all the way up skips an activity.
Deleting an Activity
You can also delete an activity entirely from your Lesson Plan page by clicking on the colored tile of the activity and then the
icon.
If you delete an activity, but decide later to bring it back, the activity can be added back into your Lesson Plan from the Activity Library.