Joellen Killion reports on the results of a five-year professional development intervention consisting of workshops and curriculum units conducted in six elementary schools in an urban district to gauge teacher knowledge and practices in science instruction for English language learners. The study looked at predictors of teacher change that…

Consistent, excellent teaching is the single greatest factor in improving student achievement over time. School leadership is the second. Excellent teaching and strong leadership require deliberate, ongoing professional learning. In working with high-poverty school systems over time, the following basics emerge: (1) time; (2) content; (3)…