Proportional reasoning is the ability to use multiplicative thinking and make multiple comparisons. It is known to be challenging for many students and at the same time, many teachers require support to develop sufficient subject matter knowledge and pedagogical content knowledge to teach the diverse concepts that underpin proportional reasoning.…

This article presents results from a case study analyzing the process of change for early childhood educators as they engage in a semester-long professional development (PD) experience focused on developing a teacher research agenda related to mathematics instruction. During this PD experience, 11 participants (5 second-grade and 6 third-grade…

"Practitioner research" is an ongoing, reflective process in which inservice teachers (i.e., practitioners) ask questions about their day-to-day teaching practice, develop plans of action to investigate these questions, draw conclusions supported by evidence as they gather, and use what is learned to facilitate changes in their pedagogy.…

Despite the long history of the study of pedagogical content knowledge (PCK), two facts remain obvious. First, there are almost as many conceptions regarding the definition of PCK as there are researchers interested in it. Second, it is largely unclear which methods enable teacher educators to best prepare teacher candidates to use PCK. Recently,…

Much has been written about the value of teacher research for inservice teachers. Despite the existence of several studies affirming these words, studies that richly describe how student teachers learn to do teacher research and then investigate the impact of inquiry on student teachers and teacher educators, particularly in culturally and…