"The picture is a lot more complicated than the data reveals," she said. "Families in South Korea, for example, spend about 10 percent of their annual income on outside tutoring, resulting in 58 percent of their students participating in those programs. A much lower percentage of U.S. students are able to access similar programs. Therefore, our country's most disadvantaged students must rely exclusively on their time in school to get the education they need."
Adding more time to the school day, Ms. Davis said, would begin to level the playing field.