In another interesting development, the study found that girls are now slightly more likely than boys to take advanced math courses. In 1982, fewer than 10% of girls had completed pre-calculus or calculus, compared to about 12% of boys. By 2004, 34% of girls were completing pre-calculus or calculus, compared to 32% of boys.That's really pretty amazing, isn't it? I mean, forget the gender gap thing for the moment. I'd guess that in the 50s, roughly 0% of high school students took pre-calculus or calculus classes. Today it's about a third. What accounts for this?