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.

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.

The idea that because the school day is shorter or the school year is shorter than the sort of white collar workday or work year, that does not actually capture how teachers spend their time.

There's definitely a tension between the way teaching is talked about and understood at the political level and how everyday average Americans think about teachers.

A lot of charter schools are non-union schools that take a lot of teachers from alternative tracks, like Teach For America. They do this in part because a lot of charter schools have very strong ideologies around how they want teachers to teach. And they find that starting with a younger or more inexperienced teacher allows them to more effectively inculcate those ideas.

[Nineteenth century American educator] Catharine Beecher is really associated with the idea that a mother works with children in the home and a teacher works with children at school, and that therefore women are almost biologically predisposed to do this job.

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.