This AEA 2012 think tank presentation was used to generate discussion about a mixed-method approach to identify “project evaluation effectiveness principles”, or PEEPs, for science education professional development. The project is funded by the NSF PRIME program. The presentation provides an overview of the methodology developed to systematically (a) examine characteristics of professional development interventions in science education contexts, and (b) assess the quality of those project evaluations. #ResearchonEvaluation #Prek-12EducationalEvaluation #QuantitativeMethods-TheoryandDesign #TeachingofEvaluation #QualitativeMethods #HowTo #MixedMethodsEvaluation #2012Conference