Pierce, S. J., Van Egeren, L., & Reyes-Gastelum, D. (2012, October). Master Teacher Series—Powering up for the Head Start on Science program: Using power analysis to plan the sample size required for a multi-site cluster randomized trial. Demonstration session presented at Evaluation in Complex Ecologies: Relationships, Responsibilities, Relevance, the 26th annual conference of the American Evaluation Association, Minneapolis, MN. This ZIP file includes PDF copy of PowerPoint slides (including speaker notes), plus a MS Word file with a resource list. #StatisticalMethods #QuantitativeMethods-TheoryandDesign #HowTo #2012Conference #ClusterRandomizedTrial #PowerAnalysis #OptimalDesign #SampleSizePlanning