Hmm. This is the bell schedule for Maddie's school:
hunterscreekms.ocps.net
Last bell at 4:04pm.
Her mom, "around 4:30", would be having to navigate car riders, plus the buses, plus the kids that walk home, in order to get into the parking lot and entrance to the school. Plus the faculty who are leaving to go home. It's super busy. I asked hubby (he's a teacher, but we're in GA) about visitors/parents coming into school buildings. Here, they have to be buzzed in. There is a camera at the door that you show your ID to, and then someone verifies you and buzzes you into the building.
Also, he said that, more than likely, front office folks were already packed up and leaving/left for the day.
Just something to ponder IMO.