Over the last decade, policy and business leaders have come to know what parents have always known: teachers make the greatest difference to student achievement. With new statistical and analytical methods used by a wide range of researchers, evidence has been mounting that teacher quality can account for a large share of variance in student test…

This report presents the case-study findings from a cross-state investigation focused on Georgia, Kentucky, Mississippi, North Carolina, South Carolina, and Tennessee, intended to deepen understanding around the influence of high stakes accountability on teacher learning and the capacity of districts and schools to support instructional practices…