A friend who lives in a wealthy suburb of Boston posted this update on Facebook:
Parent/Student/Teacher night at school. Each child was assigned to teach the parents what they were learning. My son was demonstrating adding fractions. Several of the parents could not do it – 2nd grade math.
Coincidentally, as he was posting that I was in the middle of a couple of hours of recurrent training for instrument flying. A jet pilot friend who is a CFII graciously went up with me in a Cirrus SR20 and watched for other airplanes and monitored my performance while I wore a hood that restricted my view to just the instruments. It is a well-known phenomenon that pilots get rusty and there are embarrassment-free opportunities for refresher training. In fact, given that FAA regulations require at least some refresher training every two years, even the sharpest pilots can do a bit of training without anyone asking “How come?”
The Facebook posting above shows that most folks don’t remember everything that they learned in elementary school. But where can one get refresher training on fractions, state capitals, and the rest of the 1st-5th grade curriculum? The obvious answer would seem to be Khan Academy, but https://www.khanacademy.org/math/arithmetic/fractions seems to be geared at first-time learners and those who want to develop an exhaustive knowledge of a subject, not at those who just want some dusty neural pathways touched. A quick Google search turned up Homework for Grown-ups: Everything You Learned at School and Promptly Forgot, but 368 pages doesn’t seem like enough.
Is there a weekend course that grown-ups could take every 10 years?