If you read the article, you’d see the father teaches at a Catholic school, and the children all attend the Catholic school.
Not sure what this is supposed to infer but my DIL's father is a pastor where they also have a school. He didn't even get a discount for his children to attend the school, however, you pay full for the first child, get a discount for the 2nd, etc. By the time you get to the 11th, you most likely don't have to pay anything.