Houston Independent School District (HISD) strives to provide an equitable education to all its students. To uphold the district's mission, the Teacher Appraisal and Development System (TADS) was designed with the goal of promoting effective teaching by providing systematic, rigorous feedback on teacher effectiveness in the classroom. Through the use of comprehensive rubrics and student growth measures, the TADS is intended to give teachers and school leaders the information they need to improve teacher performance in the classroom, supporting efforts to ensure that every student in the district receives the opportunity to learn from an effective teacher. The TADS has three appraisal components, with the criteria used for the Instructional Practice (IP) and Professional Expectations (PR) components remaining the same since the inception of the TADS in the 2011-2012 school year. The Student Performance (SP) component was added in the 2012-2013 school year but was waived for certain teachers at different points in time. Most recently, the SP component was waived in the 2019-2020 school year as a result of the disruption brought on by the COVID-19 pandemic. However, for teachers who were eligible to carry over their 2018-2019 ratings as their 2019-2020 ratings, there were some whose summative ratings included the SP component. The purpose of this report is to provide aggregate data of the TADS in 2019-2020, focusing on the distribution of summative ratings and the IP and PR components of the TADS. Data are disaggregated by teacher-level and campus-level characteristics to examine how teachers with these ratings were distributed throughout the district. This report also provides insight into the characteristics of teachers who carried over ratings from the previous school year as well as the utility of Instructional Practice criteria that correspond to Domains 2 and 3 of the Texas Teacher Evaluation and Support System (T-TESS) as factors in determining Teacher Designation Levels for the Teacher Incentive Allotment (TIA) initiative.