Even in Ontario I think it is possible to be allowed that many school-agers. If the daycare providers has 4 school age children of her own and 5 daycare children.

While uncommon these days it is totally possible to have 4 kids in 5years. Throw in a set of twins and it's even more possible. Throw in a short kid or two and your JK-grade 3 age range can expand a year or two giving the caregiver 7 years to have had 4 of her own children.