Occasionally when using one of the Zoom-enabled classrooms you will find that you are unable to share your screen. This is caused when someone enters the Zoom meeting before the Zoom Room joins.
On the Zoom side of the touchscreen, select Manage Participants.
Under the Participants you will see that the room does not have (Host) next to the room name, meaning the room is not able to share.
At the bottom of the participant list, select Claim Host and enter the code you retrieved from your user profile.
You will now see that the room has (Host) after the name and will be able to share.