The performance gap between white and minority students is one of the most persisting problems in American education. Since the 1990s, the performance gap, as reported by the National Assessment of Educational Progress, has more or less stagnated, says the National Journal. While a multitude of factors contribute to the disparity — most glaringly the quality of instruction in poorly funded schools — there are some underlying psychological factors as well. One widely documented phenomenon is called stereotype threat: When confronted with a racial bias (for example, a suggestion that black students do not perform well on a task), stereotyped students actually don’t do as well compared to control groups. This, in part, explains why black students may not perform as well on high-stakes tests such as the SATs. Some studies have even shown that the threat can diminish short-term memory. Another psychological roadblock, as outlined in a recent study in the Journal of Educational Psychology, is a tendency for white teachers to judge minority students’ work less critically than white students’.