What Makes a Great Teacher? by Amanda Ripley
After a year in Mr. Taylor’s class, the first little boy’s scores went up—way up. He had started below grade level and finished above. On average, his classmates’ scores rose about 13 points—which is almost 10 points more than fifth-graders with similar incoming test scores achieved in other low-income D.C. schools that year. On that first day of school, only 40 percent of Mr. Taylor’s students were doing math at grade level. By the end of the year, 90 percent were at or above grade level.
As for the other boy? Well, he ended the year the same way he’d started it—below grade level. In fact, only a quarter of the fifth-graders at Plummer finished the year at grade level in math—despite having started off at about the same level as Mr. Taylor’s class down the road.