Physics First--a movement to invert the traditional science course sequence to teach physics at the ninth-grade level--is gaining interest. However, there is limited literature exploring how to support teachers in successfully implementing Physics First. To address this, a professional development (PD) program supporting a cadre of teacher-leaders…

In this study, five elementary teachers and a university researcher developed and implemented problem-based learning (PBL) experiences in the context of science teaching and learning. Collaborative inquiry was adopted as a methodology, while a variety of qualitative methods were used to examine the engagement and development of teachers'…