In 2006, the State of Delaware and the Council of Chief State School Officers (CCSSO) partnered with the Consortium for Policy Research in Education (CPRE) to conduct an evaluation of a ten-state initiative that sought to enhance assessment practices at the high school level. This effort aimed to help states, districts, and schools build familiarity with instruction that uses assessment as part of the learning process, a practice known as assessment for learning. This report focuses primarily on the third goal of this project, the creation and function of teacher learning teams focused on assessment for learning.