In each issue of "JSD," Joellen Killion explores a recent research study to help practitioners understand the impact of particular professional learning practices on student outcomes. In this issue, she describes Z. Kisa and R. Correnti's 2015 longitudinal study of fidelity of implementation of principles of reform-aligned professional…

Surveys of seven master elementary teachers examined how they understood their professional development and investigated personal and institutional characteristics that facilitated acquisition of professional expertise. Results suggested the need to offer staff development opportunities that accounted for within-stage differences and between-stage…

Schools are organizations that affect and are affected by teachers' learning. School capacity stresses the knowledge, skills, and dispositions of individual teachers; creating a professional community among the staff; and program coherence within schools. To be effective in boosting the quality of instruction, professional development must address…