Positive school library may shrink achievement gaps

Multiple studies found that a positive school climate can weaken the effects of low family income on achievement. A positive school climate can facilitate greater equality in education opportunities and more social mobility. A negative climate increases the correlation of achievement and socio-economic backgrounds, especially for low-income families.  School climate includes factors such as "positive teacher-student relationships, sense of safety, and student connectedness to and engagement in school" (Berkowitz, et al.)
Berkowitz, R. et al. (2016). A Research Synthesis of the Associations Between Socioeconomic Background, Inequality, School Climate, and Academic Achievement. Review of Educational Research.
http://rer.sagepub.com/content/early/2016/09/19/0034654316669821.full.pdf+html?ijkey=1T3lGnRAnqVJ6&keytype=ref&siteid=sprer

Improving school climate in four areas (leadership and professional leadership, high academic expectations for students, teacher relationships and collaboration, and school safety and order. could help schools boost student achievement and reduce teacher turnover, according to a study of New York City schools. Data show improvements can lead to the equivalent of an extra month and a half of math instruction and reduce teacher turnover by 25%.
Krafct, M., & Marinell, W. (2016). School organizational contexts, teacher turnover, and student achievement.  New York, NY: Research Alliance for New York City Schools.
http://steinhardt.nyu.edu/scmsAdmin/media/users/sg158/PDFs/schools_as_organizations/SchoolOrganizationalContexts_WorkingPaper.pdf