Our old friend Ivan Smith, retired teacher and citizen Internet pioneer, takes up the suggestion that distance education could play a big part in reforming Nova Scotia's unaffordable education system: Identify a topic in grade 4 math (or grade 3 or 5) that currently is particularly troublesome for students. (This topic should be something that can be covered properly in not more than three or four class periods.) Identify four teachers, two male and two female, who have substantial experience in teaching this topic, and who have had results significantly better than average. Arrange for each teacher to teach this topic in...