Washingtonpost.com | In Sarah Wise's section of a computer systems laboratory at the elite Thomas Jefferson High School for Science and Technology, the 18-year-old senior is the only girl.

That's a better ratio, though, than in 17-year-old David Banh's computational physics class at the Fairfax County school. It has only boys.

There aren't any girls in the school's top mathematics class, either, the one with seven students who must be invited to enroll. Senior Rachel Miller, 17, who took algebra in fourth grade, was asked to join, but she decided biology would be more fun.

Decoding Why Few Girls Choose Science, Math (washingtonpost.com)