The Teacher Development Specialist program, administered through Houston Independent School District (HISD) Professional Support and Development services, was introduced in August 2011 with the goal of providing individualized professional development to teachers to enhance their performance on the HISD Teacher Appraisal and Development System (TADS) and thereby impact student achievement in every classroom. In the 2012-2013 academic year, all HISD teachers were linked to at least one Teacher Development Specialist (TDS) through their schools, but services were particularly targeted toward first-year teachers and teachers in schools prioritized for support. This report explores the relationship between TDS reports of contacts with new teachers and prioritized schools, and the impact TDS perceived they made on teacher development. Further, it provides information on student achievement in HISD schools prioritized for TDS support.