Principal Investigators: Cathy Ringstaff, WestEdJudith H. Sandholtz, University of California, Irvine Given the time and resources invested in professional development, it is important to find ways to extend positive outcomes over the long term. Similar to regular tune-ups for automobiles, the investment needed to sustain teacher outcomes may be minor in comparison to initial costs, but…Continue Reading Modest Supports for Sustaining Professional Development Outcomes over the Long Term