A little-known program has lifted ninth grade performance in virtually every type of school

There's a school improvement model that has gotten consistent results in large schools, small schools, high-performing ones, low-performing ones, those with large achievement gaps, diverse schools, homogenous ones, and schools that are rural, urban, and suburban. An impressive track record of hard evidence has made it the only program to earn three levels of competitive grant funding from the federal government since 2010.

But you've probably never heard of it...