I know it's an article of faith in the school-reform community that we should "differentiate" among teachers and pay them "differentially" too. Highly effective teachers should get paid more than mediocre ones; individuals willing to work in poor schools should get bigger paychecks than those serving the well-to-do; those in high-demand fields (like math and science) should get more than their peers. I get all of that, and generally agree.
I also understand that the "single-salary schedule" is seen as the nemesis to smart teacher policy. And that's also true. But what makes the single schedule so pernicious isn't just its uniformity; it's its growth curve. Twenty-five years veterans are paid a lot more than five-year veterans even though, on average, they are equally effective. Changing that curve is at least as important as introducing more differentiation in pay.
This isn't my idea, or a new idea. Two years ago, Duke economist Jacob Vigdor published an excellent article in Education Next, "Scrap the Sacrosanct Salary Schedule." His analysis can be summed up in the graphic below.
In all professions, new hires get paid significantly less at the start. But in fields like medicine and law, pay rises rapidly--as soon as employees boost their effectiveness and productivity from on-the-job experience. In education, on the other hand, pay rises slowly, even though teachers' effectiveness plateaus after as little as two (and no more than five) years...