This issue is part of a series on the Teacher Practice Networks initiative and its efforts to broadly support teachers in implementing college- and career-readiness instruction. Effective teachers frequently reflect on how to improve their practice: "Did I scaffold the lesson well? Did I give students enough processing time? How can I help…

A Number of good ideas can help improve the achievement of low-performing students and close the achievement gap, including determining the placement of veteran teachers, purchasing new curricula, and providing after-school tutoring. However, it is the teacher--and what the teacher does in the classroom--that makes the most difference for…