Readers know that I like a good visual aid. So, it shouldn't be surprising that I like this graph from Carpe Diem:
The chart shows that the retail price of public education per pupil has risen faster than the retail price of a gallon of gasoline.
I like the chart because it puts the steep rise in gasoline prices in contrast to the even steeper price of public education. And, of course, I can choose to forgo gassing up my gas-guzzlin' SUV, but I'm paying the price of public education whether I want to or not.
PS: You can always spot an effective post by the presence and strength of a Stephen Downes' argument in the comment thread. Stephen seems to be compelled to answer every blog post he disagrees with, a Sisyphean task if ever there was one. Unfortunately, he doesn't always have a good/persuasive argument to respond with.