There are a lot of polls that show that actually Americans have a pretty high opinion of teachers, that Americans think teachers are just about as prestigious as doctors.

The first generation of school reformers I talk about - nineteenth century education reformer Horace Mann, Catharine Beecher - they are true believers in their vision for public education. They have a missionary zeal. And this to me connects them a lot to folks today, whether it's education activist Campbell Brown or former D.C. public schools chancellor Michelle Rhee. It's a righteous sense, a reform push that's driven by a strong belief in a particular set of solutions.

The persistence of housing discrimination and housing segregation makes it difficult at times to integrate schools. So what flows from that is disappointment and cynicism and the search for what's next. And it's really in the search for what's next after that that we come upon ideas like increasing standardized testing for kids and using those tests scores to hold teachers accountable.

What happens from about 1954 to the late 1980s, is that we see a huge wave of optimism that school desegregation is going to be the way to improve educational outcomes for poor children of color. And we see a consensus build on the left and in the center that this is going to be a transformative education movement like none other we've seen in American history.

Younger teachers are definitely more likely to have worked at charter schools as opposed to have just heard of them. Charter schools explicitly look, often, to hire younger people. I've even talked to people who didn't necessarily go into teaching thinking they wanted to work at a charter school or even may have been considered critics of the charter school movement, and found that it was the only way for them to get their foot in the door. So young people just have much more familiarity with the concept.

I don't think school reform should be motivated by missionary zeal. I think it should be motivated by evidence of what works. I have been critical of Teach For America in the past but I think one of the things about their model that's interesting is that they're constantly looking at it and whether what they're doing works and reassessing their model, and making changes. So to the extent that I believe everyone in the education sector should be looking at evidence, reassessing, making tweaks to figure out what works, I think it's a positive model.

Definitely we see throughout history that American teachers are asked to be very self-abnegating. They're not supposed to be concerned with the conditions of their labor, they're not supposed to care about pay. This is the kind of vision of the ideal teacher, which is again and again brought to the fore by reformers, the ideal teacher as someone who is passionately driven to serve children. Almost to the exclusion of a more pragmatic view of what the job actually entails.