This paper focuses on commonalities and differences of three approaches to large-scale professional development (PD) in mathematics education, based on two studies from Germany and one from the United States of America. All three initiatives break new ground in improving PD targeted at educating "multipliers", and in all three cases…

This article focuses on the research and scholarship dealing with the assessment of the experiential approach in both its computer-based and human-based forms. It covers two forms of assessment. First it covers explicit attempts to assess the validity of experiential learning, and second it focuses on measuring the effectiveness of the…