So why does everyone care about a handful of numbers that a couple guys in an office crunch every day before lunch? The simple answer is that $360 trillion in assets worldwide are indexed to LIBOR, and much of those assets are consumer debt instruments like mortgages, car loans and credit card loans.

AKA the most misleading article title in the world.

The study about which Kane is being interviewed in this article found that the best way to evaluate teachers is to base 33-50% of the evaluation on value-added measures, leaving the remaining 50-67% for both student surveys and classroom observations. Kane doesn’t suggest in the interview that student surveys are the most important measure, but this headline is going to make people think that, which really bothers me. It’s catchy, but it’s wrong.