The Vim command line text editor includes a powerful copy and paste function. Instead of using your mouse to highlight a certain number of lines and copy them, you use a keyboard shortcut to indicate ...

Before you submit an error, please consult our Video Help page. Math Mights is available to stream on pbs.org and the free PBS App, available on iPhone, Apple TV, Android TV, Android smartphones, ...

Helping students to develop math fluency takes more than just flash cards. It requires teaching them how to think about ...

When you estimate a number you decide approximately, or roughly, how big that number is. To estimate accurately, you need to have a good understanding of the value and order of numbers. A number line ...