At the very time that I was packing up my books and belongings, I was going through an intellectual crisis. I was aware that I had undergone a wrenching transformation in my perspective on school reform. Where once I had been hopeful, even enthusiastic, about the potential benefits of testing, accountability, choice, and markets, I now found myself experiencing profound doubts about these same ideas. I was trying to sort through the evidence about what was working and was not. I was trying to undestand why I was increasinglu skeptical about these reforms, reforms that I had supported enthusiastically, I was trying to see my way through the blinding assumptions of politics and ideology, including my own.

I kept asking myself why I was losing confidence in these reforms. My answer: I have a right to change my mind. Fair enough. But why, I kept wondering, why had I changed my mind? What was the compelling evidence that prompted me to reevaluate the policies I had endorsed many times over the previous decade? Why did I now doubt ideas I once had advocated? (pp 1-2)