What Makes a Great Teacher?

For years, the secrets to great teaching have seemed more like alchemy than science, a mix of motivational mumbo jumbo and misty-eyed tales of inspiration and dedication. But for more than a decade, one organization has been tracking hundreds of thousands of kids, and looking at why some teachers can move them three grade levels ahead in a year and others can’t. Now, as the Obama administration offers states more than $4 billion to identify and cultivate effective teachers, Teach for America is ready to release its data.
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A 23-year veteran who earns more than $80,000 a year, this teacher has a warm manner, and her classroom is bright and neat. She paid for the kids’ whiteboards, the clock, and the DVD player herself. But she seems to have given up on the kids’ prospects in a way that Mr. Taylor has not. “The kids in Northwest [D.C.] go on trips to France, on cruises. They go places and their parents talk to them and take them to the library,” she says one fall afternoon between classes. “Our parents on this side don’t have the know-how to raise their children. They’re not sure what it takes for their child to make it.”

When her fourth-grade students entered her class last school year, 66 percent were scoring at or above grade level in reading. After a year in her class, only 44 percent scored at grade level, and none scored above. Her students performed worse than fourth-graders with similar incoming scores in other low-income D.C. schools. For decades, education researchers blamed kids and their home life for their failure to learn. Now, given the data coming out of classrooms like Mr. Taylor’s, those arguments are harder to take. Poverty matters enormously. But teachers all over the country are moving poor kids forward anyway, even as the class next door stagnates. “At the end of the day,” says Timothy Daly at the New Teacher Project, “it’s the mind-set that teachers need—a kind of relentless approach to the problem.”

Once teachers have been in the classroom for a year or two, who is very good—and very bad—becomes much clearer. But teachers are almost never dismissed. Principals almost never give teachers poor performance evaluations—even when they know the teachers are failing.

Ideally, schools would hire better teachers to begin with. But this is notoriously difficult. How do you screen for a relentless mind-set?

When Teach for America began, applicants were evaluated on 12 criteria (such as persistence and communication skills), chosen based on conversations with educators. Recruits answered open-ended questions like “What is wind?” Starting in 2000, the organization began to retroactively critique its own judgments. What did the best teachers have in common when they applied for the job?

Once a model for outcomes-based hiring was built, it started churning out some humbling results. “I came into this with a bunch of theories,” says Monique Ayotte-Hoeltzel, who was then head of admissions. “I was proven wrong at least as many times as I was validated.”

Based on her own experience teaching in the Mississippi Delta, Ayotte-Hoeltzel was convinced, for example, that teachers with earlier experience working in poor neighborhoods were more effective. Wrong. An analysis of the data found no correlation.

For years, Teach for America also selected for something called “constant learning.” As Farr and others had noticed, great teachers tended to reflect on their performance and adapt accordingly. So people who tend to be self-aware might be a good bet. “It’s a perfectly reasonable hypothesis,” Ayotte-Hoeltzel says.

But in 2003, the admissions staff looked at the data and discovered that reflectiveness did not seem to matter either. Or more accurately, trying to predict reflectiveness in the hiring process did not work.

What did predict success, interestingly, was a history of perseverance—not just an attitude, but a track record. In the interview process, Teach for America now asks applicants to talk about overcoming challenges in their lives—and ranks their perseverance based on their answers. Angela Lee Duckworth, an assistant professor of psychology at the University of Pennsylvania, and her colleagues have actually quantified the value of perseverance. In a study published in TheJournal of Positive Psychology in November 2009, they evaluated 390 Teach for America instructors before and after a year of teaching. Those who initially scored high for “grit”—defined as perseverance and a passion for long-term goals, and measured using a short multiple-choice test—were 31 percent more likely than their less gritty peers to spur academic growth in their students. Gritty people, the theory goes, work harder and stay committed to their goals longer. (Grit also predicts retention of cadets at West Point, Duckworth has found.)

But another trait seemed to matter even more. Teachers who scored high in “life satisfaction”—reporting that they were very content with their lives—were 43 percent more likely to perform well in the classroom than their less satisfied colleagues. These teachers “may be more adept at engaging their pupils, and their zest and enthusiasm may spread to their students,” the study suggested.

In general, though, Teach for America’s staffers have discovered that past performance—especially the kind you can measure—is the best predictor of future performance. Recruits who have achieved big, measurable goals in college tend to do so as teachers. And the two best metrics of previous success tend to be grade-point average and “leadership achievement”—a record of running something and showing tangible results. If you not only led a tutoring program but doubled its size, that’s promising.

Knowledge matters, but not in every case. In studies of high-school math teachers, majoring in the subject seems to predict better results in the classroom. And more generally, people who attended a selective college are more likely to excel as teachers (although graduating from an Ivy League school does not unto itself predict significant gains in a Teach for America classroom). Meanwhile, a master’s degree in education seems to have no impact on classroom effectiveness.

The most valuable educational credentials may be the ones that circle back to squishier traits like perseverance. Last summer, an internal Teach for America analysis found that an applicant’s college GPA alone is not as good a predictor as the GPA in the final two years of college. If an applicant starts out with mediocre grades and improves, in other words, that curve appears to be more revealing than getting straight A’s all along.

Last year, Teach for America churned through 35,000 candidates to choose 4,100 new teachers. Staff members select new hires by deferring almost entirely to the model: they enter more than 30 data points about a given candidate (about twice the number of inputs they considered a decade ago), and then the model spits out a hiring recommendation. Every year, the model changes, depending on what the new batch of student data shows.

This year, Teach for America allowed me to sit in on the part of the interview process that it calls the “sample teach,” in which applicants teach a lesson to the other applicants for exactly five minutes. Only about half of the candidates make it to this stage. On this day, the group includes three men and two women, all college seniors or very recent graduates.

One young woman—I’ll call her Abigail—stands up to teach her lesson. She has curly blond hair and wears a navy-blue suit. She tells us she will be teaching a fifth-grade Spanish class. She tapes up a preprepared poster. (Female applicants are more likely to bring props, which is not a bad thing. In fact, women are more likely to be effective in Teach for America, Duckworth found.) Then she writes her objective on the room’s whiteboard: to teach the days of the week. Krzysztof Kosmicki, a Teach for America program director, starts the clock.

To me, Abigail’s objective seems a little dull (especially compared with that of another applicant, who taught “the five fluids that transmit HIV”). She asks the class to repeat each of the days of the week. “I know it’s confusing,” she says. So she teaches them a song to help keep them straight, and then has the applicants sing it—twice. “If I don’t hear everyone’s voice, we’re going to sing it again until I do.” When she asks what day it is, Kosmicki volunteers the wrong answer. She asks another applicant to help correct him, which he does, and then her time is up.

The last applicant to teach is a young man I’ll call Michael. He has been very quiet, but he becomes much more animated when he starts teaching. His objective is to teach the order of operations in a math problem. “Good morning, class!” he says. When someone gets something right, he says, “Correctomundo!” He seems confident. He asks if he can get a volunteer to answer part of the problem on the board, and one of the other applicants steps up. Kosmicki asks him to explain exponents again, which he does. Time’s up.

Later, I talk with Kosmicki about his impressions. He liked Abigail’s sample teach—but not Michael’s. Kosmicki is not very interested in the things I noticed most: charisma, ambitious lesson objectives, extroversion. What matters more, at least according to Teach for America’s research, is less flashy: Were you prepared? Did you achieve your objective in five minutes?

“Abigail’s sample teach was exceptional,” says Kosmicki, who taught for Teach for America in the South Bronx before starting a charter school in Newark, New Jersey. “It was abundantly clear to me that she had practiced.” The students successfully learned the days of the week “somewhere between the third and fourth minute,” Kosmicki says. He was interested in what Abigail was doing, but he had been more focused on the other applicants, acting as her class.

This summer, those who have been accepted will go to a Teach for America training institute. That’s when Steven Farr, the in-house professor, and his colleagues take over. For them, the challenge is not to pick the perfect teacher but to diagnose strengths and weaknesses early and provide intense, customized training to correct them. Farr is more hopeful each year. “When I see not a handful, not dozens, but hundreds of people being successful in a world where most people think success is not possible, I know it can be done,” he told me.

Of course, thanks to its mission and brand, Teach for America has been able to draw from a strong recruiting pool. (During the 2008–09 school year, 11 percent of Ivy League seniors applied.) Large, low-income school districts do not get nearly as many candidates per open position, and most of the candidates they do get aren’t nearly as high-caliber. Plus, the extreme hours that Teach for America teachers put in—for two years—are not sustainable for most people over the long term.

But if school systems hired, trained, and rewarded teachers according to the principles Teach for America has identified, then teachers would not need to work so hard. They would be operating in a system designed in a radically different way—designed, that is, for success.

This year, D.C. public schools have begun using a new evaluation system for all faculty and staff, from teachers to custodians. Each will receive a score, just like the students, at the end of the year. For teachers whose students take standardized tests, like Mr. Taylor, half their score will be based on how much their students improved. The rest will be based largely on five observation sessions conducted throughout the year by their principal, assistant principal, and a group of master educators. Throughout the year, teachers will receive customized training. At year’s end, teachers who score below a certain threshold could be fired.

The handbook for the new system looks eerily similar to the Teach for America model, which is not a coincidence. The man who designed it, Jason Kamras, is a former Teach for America teacher who taught in a low-income D.C. school for eight years before being chosen by D.C. Schools Chancellor Michelle Rhee to help fix the schools. Rhee is herself a Teach for America alumna, who went on to run the New Teacher Project.

Washington, D.C., is also applying for Race to the Top money from the Obama administration, along with many states. To qualify, states must first remove any legal barriers to linking student test scores to teachers—something California and Wisconsin are already doing. To win money, states must also begin distinguishing between effective and ineffective teachers—and consider that information when deciding whether to grant tenure, give raises, or fire a teacher or principal (a linkage that the National Education Association, the country’s largest teachers union, has criticized as “inappropriate” federal interference in local prerogatives). And each year, states must publish which of their education and other prep programs produced the most effective (and ineffective) teachers and principals. If state and local school officials, along with teachers unions, step up to the challenge, Race to the Top could begin to rationalize America’s schools.

By the time the Obama administration begins handing out awards this spring, Mr. Taylor will be finishing up another year at Kimball Elementary. On the mornings his students take their standardized tests, he will cook a hot breakfast of sausage, eggs, and toast for them, as he always does. But this tradition may be coming to an end. He’s thinking about quitting in the next few years.

Mr. Taylor wants to become a principal. In just three years as a teacher, he feels that he has already run up against the limits of his classroom. He wants to bring what he has learned to scale. That way, he says, “it won’t just stay with me, bundled in Room 204.” He is, like many great teachers, well aware that he is not one in a million—or at least, that he should not be.

Amanda Ripley is the author of The Unthinkable: Who Survives When Disaster Strikes—and Why.
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Amanda Ripley is the author of The Smartest Kids in the World—and How They Got That Way (coming August 2013).

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