Claudio Sanchez reports on the latest results of a 30-year survey of nine, thirteen, and 17-year old American students. The report, which looks at reading, math and science scores, shows today's students are doing better in math than students did 30 years ago. Performance is mixed in reading and science. The survey finds the academic gap between boys and girls has virtually disappeared. It says the gap between white and minority students closed for a while, but has started to open up again. The report also says a much greater percentage of today's students are taking tough courses, such as calculus, than students did 30 years ago.