Old age home/orphanage.

Now this may already be up and running in several places, I won't know for sure.
Where I come from, the city and the country, they concept of an orphanage and an old age home existing in the same complex is not unheard of, it just does not exist.

Now when you really consider it, the innocent children in the orphanage really require some sort of parental guidance or even real world advise.
The folks in old age homes are mostly unfortunate people well past their prime. People would absolutely love the opportunity to live and love again. To care for someone and be responsible for something. The major killer in an old age home isn't a disease, it may very well be the tendency to 'give up' when a person feels they have nothing to live for.
Children can do with a certain set of morals way before they're let to run around amok on the road. Morals that can't be expounded by nuns who probably meet the children once in two days.

I suggest the youngest members get the youngest children and so on. So that by the time we get to the really old folks, the responsibly slowly leans on the child.