In each issue of the "Journal of Staff Development" ("JSD"), senior advisor to Learning Forward author Joellen Killion explores a recent research study to help practitioners understand the impact of particular professional learning practices on student outcomes. Detailed in this issue is a randomized control study in which…

The field of staff development needs better evaluation both to improve the effectiveness of teachers' learning experiences and to produce credible evidence that will garner more support for professional development. Getting serious about evaluating professional development demonstrates that a school system or school is truly serious about…