More high school students are taking math and science classes - a good thing, we all want more science literacy - but the U.S. Education Department, in its quest to stop people from wondering how it still exists after 33 years of education not being a federal prerogative, cautions that scores have stagnated.To people not trying to rationalize their jobs, and not in the scare journalism business, that simply means we had nearly 50% fewer people in 1970 but we have a lot more now and the same percentage are good at math and science. Math and science remain hard.That's why smarter people do it.