As former principals who led turnaround schools and now as coaches who work with school leaders and their teams, the authors know that there are many challenges all school leaders face. The authors have found there is one consistent factor that separates schools that successfully respond to challenges from the rest: the collective understanding that overcoming challenges is a shared responsibility. In every successful school, principals and other administrators are not the only leaders. In schools that make real progress, the staff as a whole has recognized that leadership is a shared responsibility. In this article, the authors highlight three best bets, or practical moves school leaders can make to promote shared leadership across their schools. Key to all of these moves is inviting teachers into the school improvement process so they have the agency "to act purposefully and constructively to direct their professional growth and contribute to the growth of their colleagues" (Calvert, 2016, p. 4).