Based on an extensive analysis of state waiver plans, this report shows that recent progress in holding schools accountable for how many students they graduate from high school--the ultimate goal of K-12 education--may be slowed in some states based on waivers recently granted under the Elementary and Secondary Education Act (ESEA), currently known as the No Child Left Behind Act (NCLB). The report includes a review of approved waiver plans submitted by thirty-four states and the District of Columbia. The following are appended: (1) High School Graduation Rate Accountability: (1) State-by-State Highlights and Recommendations, and (2) High School Graduation Rate Accountability in States' Waiver Applications: Concerns by Issue.