We've all heard it before: boys are simply better at math than girls are. But according to a new study published in Science, the math gender gap has vanished. Previous studies showed that boys start to outscore girls in math once they reach high school. Information gathered last year from the math tests of 7.2 million kids in Grades 2 to 11 in 10 states, however, revealed that there are no longer any significant differences between boys' and girls' average scores. Similarly, an equal number of both sexes were found to perform so well that they ranked among the highest mathematical achievers. Scientists say the results show that more girls are taking math courses and, most important, sticking with them as they get older.