What role do teachers play in education?

School of One, an online math program piloted at three New York City public schools, as one of the year’s 50 best innovations. Each day, School of One software generated individualized math “playlists” for students who then chose the “modality” in which they wished to learn — software, a virtual teacher or a flesh-and-blood one. A different algorithm sorted teachers’ specialties and schedules to match a student’s needs. “It generates the lessons, the tests and it grades the tests,” one veteran instructor marveled. It saved salaries, too, thereby “teacher proofing” (as policy wonks say) education in a few clicks.

Although School of One made only modest improvements in students’ math scores and was adopted by only a handful of New York schools (not the 50 for which it was slated), it serves as a notable example of a pattern that Andrea Gabor, who holds the Bloomberg chair of business journalism at Baruch College/CUNY, charts in “After the Education Wars.” For more than three decades, an unlikely coalition of corporate philanthropists, educational technology entrepreneurs and public education bureaucrats has spearheaded a brand of school reform characterized by the overvaluing of technology and standardized testing and a devaluing of teachers and communities.

The education wars have been demoralizing for teachers, over 17 percent of whom drop out within their first five years. No one believes that teaching to the test is good pedagogy, but what are the options when students’ future educational choices, teachers’ salaries and retention and, in some states, the fate of entire schools rest on student test scores?

In meticulous if sometimes too laborious detail, Gabor documents reform’s institutional failings. She describes the sorry turns in New York City’s testing-obsessed policies, the undermining of Michigan’s once fine public schools (spurred in part by constant pressure from the DeVos family) and the heartbreaking failure of New Orleans to remake its schools after Hurricane Katrina. The largely white government to rebuild its public schools as the nation’s first citywide, all-charter system. A dozen years later, more than a third of the city’s charter schools have failed.

These grim realities are not Gabor’s whole story. She takes pains to highlight diverse school districts that have succeeded, mostly by directly or indirectly implementing the “quality management” philosophy of W. Edwards Deming, the subject of one of her previous books. She sees Deming’s bottom-up, collaborative approach in New York’s progressive school movement, in postindustrial Massachusetts and in the large Leander district of central Texas as well as in inspiring, educator-led experiments across the country based on community participation, teacher voice, professional development and student-centered pedagogy.

More than 85 percent of the nation’s children attend public schools, yet decades of privatizing have damaged public education. “After the Education Wars” helps us to see a better way forward.