The Houston Independent School District (HISD) launched the Effective Teachers Initiative (ETI) in 2010 with the goal of increasing teacher effectiveness to improve student achievement. As part of this initiative, HISD implemented the Teacher Appraisal and Development System (TADS) in the 2011-2012 school year to provide teachers, principals, and district officials the information they need to improve teacher performance in the classroom and, thereby, increase student outcomes. This report documents teacher appraisal outcomes from the 2015-2016 school year and includes historical data since 2011-2012. Teacher appraisal outcomes are presented by summative ratings across multiple years, and by campus level variables and teacher characteristics. Teacher appraisal outcomes are then described by each TADS component -- Instructional Practice (IP), Professional Expectations (PE), and Student Performance (SP). Finally, this report examines the impact of Student Performance on summative ratings.