From the TikTok feeds that brought you girl dinner comes girl math: a strategy for justifying large or unnecessary purchases. The calculations behind girl math aren't new, but the way we talk about ...

Adding numbers can be made considerably easier by learning the proper techniques. Among these arithmetic strategies, the "Make 10" method gives kids more self-assurance and speeds up calculations.

About 10 years ago, Alan Garfinkel, a professor in the life sciences department at the University of California, Los Angeles, got a call. It was from his dean, who said that the department had ...