Jonah Lehrer says stop resorting to bean-counting Excel spreadsheets to argue for arts in education.
The current obsession with measuring learning certainly has some benefits (accountability is good), but it also comes with some serious drawbacks, since it diminishes all the forms of learning, like arts education, that can't be translated into a score on a multiple choice exam. That's why the research cited above is so important: it helps us appreciate the "soft" skills that we tend to neglect.
But I think that even this clinical evaluation of arts education misses an important benefit: self-expression. I shudder to think that second graders, at least in most schools, are never taught the value of putting their mind on the page. They are drilled in spelling, phonetics and arithmetic (the NCLB school day must be so tedious), and yet nobody ever shows them how to take their thoughts and feelings and translate them into a paragraph or a painting. We assume that creativity will take care of itself, that the imagination doesn't need to be nurtured. But that's false. Creativity, like every cognitive skill, takes practice; expressing oneself well is never easy.
I say anything that gets kids to work, and actually enjoy their work, in school pays for itself.