In 2004, 15,000 students failed to graduate in Oklahoma. The Alliance for Excellent Education, a Washington, D.C.-based advocacy group, estimates those 15,000 Oklahomans over the course of their lifetimes could cost the state $4 billion in lost wages, tax revenues and productivity. Across the United States, 1.3 million teens failed to graduate, which could cost the nation an estimated $325 billion.