Blended 50/50 families should be attached to a custody calendar that follows according to the agreement and can be automated to switch Family 1 and 2, much like scheduling or scheduled tasks. The days that mom has the child-she's family 1. The days dad has the child, he's family 1. Busing, emergency contacts, and attendance (and possibly discipline) should be able to be tracked according to the custody calendar. This would provide valuable information for intermediaries to see where the student thrives.