Evaluation of the Local Systemic Change initiative encompassed 88 funded projects, nationwide, over a period of 10 years. Evaluators interviewed LSC project leaders, assessed the quality of professional development sessions, queried teachers and principals, observed classroom instruction, and tracked the district policy environment. Data collection included observations of more than 2,400 professional development sessions and 1,620 mathematics and science lessons, as well as 75,000 teacher questionnaires, 17,380 principal questionnaires, and 1,782 teacher interviews. As a result of the evaluation, new classroom observation protocols were developed and over 200 classroom observers were trained to use these protocols. These protocols are also used nationally outside of the LSC both to evaluate instruction and as a tool to help the education community develop a vision of effective instruction.