In the United States (population of 340 million): * 86 million (27%) are under 21 and most of those are students. * Those people have parents, assume 2 parents

In the United States (population of 340 million): * 86 million (27%) are under 21 and most of those are students. * Those people have parents, assume 2 parents per 2 children = 86 million parents (27%) That means 55% of the US population is eligible for the cheaper rate before you even account for people getting secondary degrees, educators, and yes - the schools themselves.