The kids don't have to be there the whole time. Just the school is open. So you can have school open at 7 for dropoff and the kids can play in the yard but school actually starts at 8:30 or 9:00. Same at the end, classes might end at 3:00 or 4:00 but the school is open with supervision until 6:00 and the kids can play in the yard until the parents come get them.
The kids don't have to be there the whole time. Just the school is open. So you can have school open at 7 for dropoff and the kids can play in the yard but school actually starts at 8:30 or 9:00. Same at the end, classes might end at 3:00 or 4:00 but the school is open with supervision until 6:00 and the kids can play in the yard until the parents come get them.