This article reports on how an incorrectly graded licensing exam for prospective teachers has stalled hiring in some places, sent school districts rummaging through employment records, and spawned at least one lawsuit so far. Those affected by the mistake range from 35 test-takers in Georgia to roughly 1200 in Ohio. Eighteen states use the Praxis series of exams as part of their teacher-licensing requirements. The mistakes made by the Educational Testing Service that led thousands of teacher-candidates to believe they had failed the Praxis II test also have added to the debate over how much reliance educators and policymakers should place on standardized exams to make high-stakes decisions.