Back in the day when I was a college student, I was participating in "technology roadshow" events around the country presenting Drupal to various people. At one occasion, I presented to primary school and high school teachers and surprisingly, one of the teachers from my old high school was there, interested in the topic. We explained with my co-presenter István Palócz, that Drupal is free (as in speech and in beer), and that they can just install that for their school (as István did at that time), and use as an intranet or their public facing site.