Math has a certain logic to it. If you use it to accurately describe a situation, sometimes you can predict the inevitable — for instance, the moment an eclipse will take place — centuries in advance.

Earlier this week, I wrote about the history of progressive math education, the culture wars it has inspired over the past hundred years, and the controversy over the California Math Framework. Today, ...

Do the Math: 8 Hidden Features in Apple's Calculator App (Now on iPad, Finally) Apple's Calculator app does more than help you calculate tips. With the latest OSes, it launches on iPad and lets you ...