The Literacy Design Collaborative (LDC) was created to support teachers in implementing college and career readiness standards in order to teach literacy skills throughout the content areas. Teachers work collaboratively with coaches to further develop their expertise and design standards-driven, literacy-rich writing assignments within their existing curriculum across all content areas. This report presents the results on implementation of LDC in the New York City Department of Education during the third year of the intervention, and the impact of the program across multiple years. As of 2018-2019, participating schools included 13 from Cohort 1, which began implementation during the 2016-2017 school year, and 23 from Cohort 2, which commenced at the beginning of the 2017-2018 school year. Our primary impact analyses, presented in this report for the first time, pool teachers from both cohorts to measure their impact after participating in LDC for 2 consecutive years (2017-2018 student outcomes for Cohort 1 and 2018-2019 student outcomes for Cohort 2). Teachers and administrators appreciated LDC and perceived positive impact on their practice and their students' learning. Quasi-experimental analyses tended to produce positive estimates for the impact of LDC on student English language arts (ELA) assessment scores, but the differences did not reach the level of statistical significance. [For the 2017-2018 evaluation report, see ED606884.]