Whatever the wishes of scale-obsessed educational entrepreneurs, schools still appear to improve slowly. There are no easy solutions and no quick fixes. But this cohort of reformers, led by a posse of assertive billionaires and their allies, is united in its faith and unprecedented in its influence. As such, setbacks alone are hardly enough to challenge the way they approach school reform. And that’s a problem. Not just because they are so frequently wrong, but because each time they make the case for a new reform, they blast public school leaders, disrespect what teachers know about classrooms, disregard most of the research on school improvement, and frame our schools as failures. That isn’t common sense; that’s arrogance.