This executive summary describes a study that finds nearly every school in the Great Lakes states is threatened to fail the Adequate Yearly Progress (AYP) requirements mandated by the federal "No Child Left Behind" (NCLB) Act. NCLB holds schools and districts accountable for student achievement on state standardized tests and schools that do not make AYP face sanctions. A school or district can avoid sanctions one of two ways: produce test scores that meet AYP annual objectives set by the state, or by making sufficient improvement over the previous year's test scores to take advantage of "Safe Harbor" status. The goals of NCLB are deceptively simple: All schools and districts receiving funds for socially and economically deprived children (Title I) must bring all students up to state standards by 2014. The implementation is considerably more complex. The most critical and controversial aspects of NCLB are school accountability policies and AYP requirements. This study examines the implementation of those policies in the Great Lakes states, and projects the percentage of schools that will make or fail to make AYP, and those that could be Safe Harbor eligible. [For the full report, "The Impact of the Adequate Yearly Progress Requirement of the Federal 'No Child Left Behind' Act on Schools in the Great Lakes Region," see ED531289.]