The Houston Independent School District (HISD) launched the Effective Teachers Initiative in 2010 in order to provide every student in HISD with excellent instruction. As part of this initiative, HISD implemented the Teacher Appraisal and Development System (TADS) in 2011 to provide teachers, principals, and district officials the information they need to improve instructional practice, to inform staffing decisions, and to ensure every student receives effective teaching. This report documents teacher appraisal outcomes from the 2014-2015 school year with historical data from the program's inception since 2011-2012. Teacher appraisal outcomes are summarized by each appraisal component--instructional practice, professional expectations, and student performance. Each appraisal component is then examined according to select teacher and campus level variables, including school academic level, accountability ratings, and teacher characteristics. In addition, teacher retention and teacher movement between schools are explored according to appraisal ratings, school location, and teacher experience level. Finally, teacher performance, by experience and new hire subgroups, is more closely examined at Improvement Required (IR) schools and Met Standard schools.