She taught in Baltimore for three years after graduation, where she allegedly abused her fourth-graders by taping over their mouths. She admitted to losing control of her class. Student test scores dropped precipitously in her class. In her second and third year in the Baltimore schools, she co-taught a class with another teacher. Rhee later claimed she (and, one assumes, the other teacher) got test scores to rise from the 13th percentile to the 90th percentile over two years. In fact, they were less than half that. Rhee claims the discrepancy is due to reporting of preliminary scores (which she used) versus final scores (which the state reported).