A New Approach to Sustaining Pre-K Impacts: Leveraging Naturally Occurring Lotteries to Examine a District-Wide Rollout of Instructional Alignment across Pre-K and Kindergarten - MDRC; McCormick, Meghan; Unterman, Rebecca; Pralica, Mirjana; Weiland, Christina; Weissman, Amanda; Hsueh, JoAnn (MDRC, 2022)