Among all in-school factors that impact student learning, teachers carry the most weight -- but school leaders are not far behind. Decades of research have proven the positive influence principals can have on student achievement, school climate and teaching quality. New evidence suggests that their impact may be even greater than previously…

Likeness, also known as homophily, describes the tendency for individuals to seek out others who are socially similar to themselves. As a society, we are attracted to "like" behaviors, but subconsciously the value placed on likeness can lead to undesirable outcomes including segregation, reduced diversity in peer groups, and narrower…