"This is the piece that's been missing." This reaction is common among educators engaged in AIW Iowa, an initiative that engages teachers and administrators in professional learning communities that are improving student achievement, increasing student engagement, and building a schoolwide professional culture focused on improving…

Budget-conscious Americans are increasingly asking that staff developers provide hard data about program effectiveness. The concept of return on investment (ROI) is useful in documenting the effectiveness of staff development programs. To calculate ROI, baseline data must be compared with results realized by the organization. (SM)

A Texas district shows what can be done when school-based staff developers work with teachers dedicated to improvement--student achievement improves in just one year. The author points out the factors that helped make it work and offers tips for traps to avoid. (Contains 10 charts.)