"NSDC Policy Points" is a newsletter published by the National Staff Development Council (NSDC). This issue of "NSDC Policy Points" focuses on NSDC's advocacy for a powerful new definition of professional development. Based on a model of continuous improvement, the new definition engages educators in a cycle of analyzing data, determining student and adult learning goals, designing joint lessons that employ evidence-based strategies, providing coaching to support improvement of classroom instruction, and assessing the effectiveness of educator learning and teamwork on student learning. Included in this newsletter are: (1) Key points in NSDC's definition of professional development; and (2) NSDC's Definition in Action: Monroe Township's path to continuous teacher learning. [For Volume 1, Number 1 of "NSDC Policy Points," see ED536365.]