Over the past four decades, the per-student cost of running our K-12 schools has more than doubled, while our student achievement has remained virtually flat. Meanwhile, other countries have raced ahead.
To build a dynamic 21st-century economy and offer every American a high-quality education, we need to flip the curve.
When you need more achievement for less money, you have to change the way you spend. In K-12, we know more about what works.
We know that of all the variables under a school's control, the single most decisive factor in student achievement is excellent teaching. It is astonishing what great teachers can do for their students.
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Yet compared with the countries that outperform us in education, we do very little to measure, develop and reward excellent teaching. We have been expecting teachers to be effective without giving them feedback and training.
To flip the curve, we have to identify great teachers, find out what makes them so effective and transfer those skills to others so more students can enjoy top teachers and high achievement.
To this end, our foundation is working with nearly 3,000 teachers in seven urban school districts to develop fair and reliable measures of teacher effectiveness that are tied to gains in student achievement. Research teams are analyzing videos of more than 13,000 lessons, focusing on classes that showed big student gains so it can be understood how the teachers did it. At the same time, teachers are watching their own videos to see what they need to do to improve their practice.
Our goal is a new approach to development and evaluation that teachers endorse and that helps all teachers improve.
Instead of building a system to measure and promote excellence, we have poured money into proxies, things we hoped would have an impact on student achievement.
The United States spends $50 billion a year on automatic salary increases based on teacher seniority. It's reasonable to suppose that teachers who have served longer are more effective, but the evidence says that's not true. After the first few years, seniority seems to have no effect on student achievement.
Another standard feature of school budgets is a bump in pay for advanced degrees. Such raises have almost no impact on achievement, but every year they cost $15 billion that would help students more if spent in other ways.
Perhaps the most expensive assumption embedded in school budgets — and one of the most unchallenged — is the view that reducing class size is the best way to improve student achievement. U.S. schools have almost twice as many teachers per student as they did in 1960, yet achievement is roughly the same.
What should policymakers do? One approach is to get more students in front of top teachers by identifying the top 25 percent of teachers and asking each to take on four or five more students. Part of the savings could be used to give the top teachers a raise. (In a 2008 survey funded by the Gates Foundation, 83 percent of teachers said they would be happy to teach more students for more pay.) The rest of the savings could go toward improving teacher support and evaluation systems, to help more teachers become great.
Compared with other countries, America has spent more and achieved less. If there's any good news in that, it's that we've had a chance to see what works and what doesn't. That sets the stage for a big change that everyone knows we need: building exceptional teacher personnel systems that identify great teaching, reward it and help every teacher get better.