Teacher Quality is the Only Thing

Big stories this month in both the Atlantic and the New Yorker about new research showing that the quality of teachers makes a huge difference in how much students learn. Here is Malcolm Gladwell's piece in the New Yorker:

Eric Hanushek, an economist at Stanford, estimates that the students of a very bad teacher will learn, on average, half a year’s worth of material in one school year. The students in the class of a very good teacher will learn a year and a half’s worth of material. That difference amounts to a year’s worth of learning in a single year. Teacher effects dwarf school effects: your child is actually better off in a “bad” school with an excellent teacher than in an excellent school with a bad teacher. Teacher effects are also much stronger than class-size effects. You’d have to cut the average class almost in half to get the same boost that you’d get if you switched from an average teacher to a teacher in the eighty-fifth percentile. And remember that a good teacher costs as much as an average one, whereas halving class size would require that you build twice as many classrooms and hire twice as many teachers.

Hanushek recently did a back-of-the-envelope calculation about what even a rudimentary focus on teacher quality could mean for the United States. If you rank the countries of the world in terms of the academic performance of their schoolchildren, the U.S. is just below average, half a standard deviation below a clump of relatively high-performing countries like Canada and Belgium. According to Hanushek, the U.S. could close that gap simply by replacing the bottom six per cent to ten per cent of public-school teachers with teachers of average quality.

As Gladwell explains, the usual measures of teacher "quality" -- certification, master's degrees, years of experience -- have very little relationship to the quality of the teaching. Paying more for teachers with masters degrees just encourages teachers to put their efforts into something that has no bearing on their job performance, instead of something like class preparation that makes a difference.

In the Atlantic, Amanda Ripley profiles a star teacher who works in one of Washington's poorest schools but routinely gets stellar results -- last year only 40% of his fifth grade students were performing at grade level when the year started, but by the end of the year 90% were.

If the credentials of the teachers don't matter, what does? The quality of the interactions between the teacher and his or her students. One organization that has tried to sort this out is Teach for America:

As Teach for America began to identify exceptional teachers using this data, Farr began to watch them. He observed their classes, read their lesson plans, and talked to them about their teaching methods and beliefs. He and his colleagues surveyed Teach for America teachers at least four times a year to find out what they were doing and what kinds of training had helped them the most.

Right away, certain patterns emerged. First, great teachers tended to set big goals for their students. They were also perpetually looking for ways to improve their effectiveness. For example, when Farr called up teachers who were making remarkable gains and asked to visit their classrooms, he noticed he’d get a similar response from all of them: “They’d say, ‘You’re welcome to come, but I have to warn you—I am in the middle of just blowing up my classroom structure and changing my reading workshop because I think it’s not working as well as it could.’ When you hear that over and over, and you don’t hear that from other teachers, you start to form a hypothesis.” Great teachers, he concluded, constantly reevaluate what they are doing.

Superstar teachers had four other tendencies in common: they avidly recruited students and their families into the process; they maintained focus, ensuring that everything they did contributed to student learning; they planned exhaustively and purposefully—for the next day or the year ahead—by working backward from the desired outcome; and they worked relentlessly, refusing to surrender to the combined menaces of poverty, bureaucracy, and budgetary shortfalls.

The bottom line for all you teachers: it's all up to you, and your results will depend a lot on the level of effort that you put into your work. Have a relaxing day.