The Race to the Top - Early Learning Challenge (RTT-ELC) grants program, sponsored by the U.S. Department of Education and U.S. Department of Health and Human Services, aimed to improve children's access to high quality early learning and development programs. RTT-ELC awarded $520 million in the first of three rounds of grants to help states develop and implement systems that rate early learning and development programs on quality and help them improve. These systems are known as tiered quality rating and improvement systems (TQRIS). TQRIS rate programs based on state-defined quality standards. A key objective for RTT-ELC was to increase the number of early learning and development programs in the top rating levels of the TQRIS, and to increase the number of children with high needs, such as those from low-income households, enrolled in these programs. This brief examines states' progress on this objective by describing patterns of TQRIS participation and ratings for the nine Round 1 states during the grant period (2012 to 2016). The brief presents patterns by state and for four types of programs: (1) state-funded prekindergarten (pre-K) programs; (2) Head Start programs; (3) licensed centers that received child care subsidies; and (4) licensed centers that did not receive subsidies. Key findings, based on administrative TQRIS data from the nine states, include: (1) TQRIS participation in all states and among all types of programs increased from 2012 to 2016; (2) Patterns in the percentage of programs in the top two rating levels differed substantially by state from 2012 to 2016; (3) Most states increased the percentage of programs at the top rating levels; and (4) The availability of high-rated programs for low-income children increased over time in the nine RTT-ELC states. [Additional contributions to this report were made by Amy Defnet, Adrienne Jones and Tara Wildszewski. For the related reports "Are Ratings from Tiered Quality Rating and Improvement Systems Valid Measures of Program Quality? A Synthesis of Validation Studies from Race to the Top - Early Learning Challenge States. NCEE 2019-4001," see ED594510; "Quality Ratings and System Characteristics: Patterns in the Round 1 Race to the Top - Early Learning Challenge States. Evaluation Brief. NCEE 2019-4004," see ED594512; and "Implementation of Tiered Quality Rating and Improvement Systems in States That Received Race to the Top - Early Learning Challenge Grants. Study Highlights," see ED594516.]