Why has the modern educational establishment become so obsessed with standardized testing and uniformity of measurement? When did so many people start believing that you could plot learning as numbers and graphs — and still teach children what they need to know?
That’s what I kept thinking as I read about a $1.1 million project to look into designing “galvanic skin response” bracelets for students to wear that would measure their degree of engagement with what they were listening to. The goal is to find out whether physiological feedback from these sensors could tell teachers whether students are learning or not.
If you’re not familiar with the phrase “galvanic skin response,” it’s just the name for the process of measuring how electricity flows through the skin depending on changes in moisture. It’s the principle upon which so-called lie detectors work. (Those things are bogus, but that’s another story entirely.)
Is this really the way some people believe we should decide whether kids are learning? Are we going to keep going until we strap a sensor helmet on kids every morning so we can monitor their thoughts for the full day?

I often need this warning label: ‘Does not play well with others’
Everything sounded fair at the time, so why’d I end up paying for it all?
I’ve been sent to Facebook jail — and nothing about it makes sense
If I look closely at my old self, there’s a lot which is now dead
You can change your story, but you first must throw away the old ones
The Alien Observer: I’m not going to change — and you’re not, either
‘Let’s Make a Deal’: Democracy is like a dumb old TV game show
Whether it makes sense or not, I’ve learned to expect miracles