>is this childcare or education?

Two birds, one stone. There are definitely flaws in the way the system is designed currently but I think it's an issue with the charter system as a whole. The private UPK schools dont have a financial incentive to keep 3 or 4 extra teachers on payroll to allow for the extended day. And honestly teachers dont have an incentive either because their employers are unwilling to offer adequate compensation.

Call me a fundamentalist if you want, but this is a great example of why all levels of education should be Public. So that universal childcare is possible.