This study explored what was entailed in implementing a professional development (PD) designed in the United States (US) to a different, Israeli, context. To achieve this goal, the first step was empirically examining the effectiveness of such a PD using quantitative methods. We then examined which adaptations were made in the imported PD and at…

Teaching and learning fractions has traditionally been one of the most problematic areas in primary school mathematics. Several studies have suggested that one of the main factors contributing to this complexity is that fractions comprise a multifaceted notion encompassing five interrelated subconstructs (i.e., part-whole, ratio, operator,…

This paper indicates that prospective teachers' familiarity with theoretical models of students' ways of thinking may contribute to their mathematical subject matter knowledge. This study introduces the intuitive rules theory to address the intuitive, "same sides-same angles" solutions that prospective teachers of secondary school mathematics come…