Research continues to confirm that without "excellent" teachers consistently, most students who start behind stay behind, and too few middling and advanced students leap ahead. Even solid teachers who achieve one year of learning progress leave achievement gaps intact. Schools that "consistently" provide all students with…

Our nation is squandering one of its most important resources--our best teachers--and children are paying the price. We asked a simple question: "Will our nation's bold efforts to recruit more top teachers and remove the least effective teachers put a great teacher in every classroom?" We ran the numbers and discovered a disappointing…