Research shows that there is only half as much variation in student achievement between schools as there is am... — Bill Gates

Research shows that there is only half as much variation in student achievement between schools as there is among classrooms in the same school. If you want your child to get the best education possible, it is actually more important to get him assigned to a great teacher than to a great school.

Author: Bill Gates

Insight: It's counterintuitive because we've been conditioned to think of "good schools" as the main lever—we stress about school rankings, neighborhoods, tuition fees. But the research points to something more immediate: the person standing in front of your kid five days a week matters more than the building's reputation. A stellar teacher in an average school often outpaces a mediocre one in a prestigious place. That's worth sitting with, especially if you're already committed to wherever your child attends. The practical implication is that you have more agency than you think. Yes, school choice matters, but so does advocating for your kid to land with a teacher known for clarity, patience, and actual engagement. It's messier than just picking the "best" school—it requires relationships with administrators, sometimes timing, sometimes luck. But it reframes the problem: instead of feeling trapped by geography or resources, you're looking at something you can influence more directly. There's also a humbling flip side here. If teacher quality matters this much, it means individual educators have enormous power to shape outcomes. That's motivating for teachers but also a reminder that we dramatically underinvest in their selection, training, and support. We obsess over school buildings while treating the people inside them as interchangeable.