Empirical research bears out the conventional wisdom that teacher quality is the key schooling resource influencing student achievement, so it is not surprising that policy makers attempt to influence it by regulating admission into the teacher labor market through licensure systems. Most of...

Using testing data from 2.1 million students in 10,000 schools in 49 states (plus D.C.), we investigate the role of remote and hybrid instruction in widening gaps in achievement by race and school poverty. We find that remote instruction was a primary driver of widening achievement gaps. Math...