This is a wonderful piece by the Shanker Institute:
Our guest authors today are Matthew A. Kraft and John P. Papay. Kraft and Papy are Assistant Professors of Education at Brown University. In 2015, they received the American Educational Research Association Palmer O. Johnson Memorial Award for the research discussed in this essay.
http://www.shankerinstitute.org/blog/developing-workplaces-where-teachers-stay-improve-and-succeed