When my grandmother attended primary and secondary school in the 1920’s and 30’s, she was required to take courses in “Metaphysics” and “Logic” (I saw her report card–of course, the school was a private catholic institution). According to her, Plato, Aristotle, Augustine, Aquinas, Descartes, etc. were all familiar to her by the time she was in high school.
When I lived in Hawaii for a year, I worked at Kaplan, Inc. and met a couple guys who worked there who were Ph.D philosophy students (ABD) at the University of Hawaii. I asked them what they were going to do after graduation and they told me about this project (link above) where they would go around to the primary and secondary schools in the state to develop classes/programs to basically teach critical reasoning skills. Seems like a really good idea to me insofar as it addresses both: (1) the problem of excesses of professionally trained philosophers with marginal employment opportunities (2) the problem of generations of americans graduating high school and going on to adulthood as students, employees, citizens, etc. with gross deficiencies in the ability to think critically.
And, another ancillary benefit worth noting is that it would allow academic philosophers at colleges to actually engage in substantial depth with the various thinkers and traditions with their students, instead of spending time (as is sometimes the case) dealing with simple errors in reasoning.