Congratulations to Dave Pierson for successfully defending his masters thesis entitled Elementary teachers’ assessment actions and elementary science education: Formative assessment enactment in elementary science.  Dave used RAES-Iowa project data to conduct a comparative case study investigating elementary teachers’ reasoning about students’ ideas and classroom formative assessment practices.  His committee members were myself, Soonhye Park, Associate Professor of Science Education in the University of Iowa College of Education, and Gabrielle Ludwig, Professor in the UI Department of Occupational and Environmental Health.  Dave, great work on this substantial accomplishment!