When all rooms for a specific grade/age are at capacity or closed and a person of that age/grade can not checkin, their name does not appear at Checkin or it will say no areas available for checkin.  This can be confusing for parents. They often wonder why...

I think it would be a cool idea to have still have the person appear on screen... but instead, potentially in a greyed out fashion.  Maybe have text over their name that says: All rooms closed or at capacity for this child.