Classrooms might feel a bit more like Perez's machine than tidy rows of desks, said Gerald Wheeler, interim executive director of the National Science Teachers Association.

CNN: This 'Mousetrap' can crush a car -- and teach physics

Metric is by far the best and most consistent for the world's scientists and engineers and it often appeals also to those who are tidy-minded, who like the idea that life is run according to ordered principles.

BBC: Gonna take a centi-mental journey

Like most true stories, the beginning isn't tidy, but we'll start in the 1920s when the idiom top of the world was first used as an advertising catch phrase.

NPR: Blues Song Is a Decades-Long Music Lesson

People who a few years ago were peasants now work for multinationals, live in tidy flats with big-screen televisions and, like parents everywhere, worry about the education of their children.

ECONOMIST: China

It may seem like a risky investment, but some analysts say the government is likely to end up making a tidy profit from the deal through interest and stock profits.

NPR: Taxpayers Could Profit From Loan To AIG