There are many many things wrong with today's form of educational accountability, but today I want to focus on the numbers. Too often these data-driven decisions are being driven by numbers.
Now, I'm not saying all stats or numbers are born equally. It would be foolish to write-off all research as being invalid and unreliable; it's important to maintain a healthy scepticism so that we can identify the good research from the bad.
With that in mind, it is important to remember that sometimes the most important things in life are almost impossible to measure, and so when we reduce something as complicated as learning to a number, it is important to remember numbers might impress, but they also tend to conceal more than they reveal.