It doesn't happen that often, but we've all been in a situation where we need to measure something and don't have a ruler. Luckily, you probably already have a "good enough" ruler in your pocket: a ...

To find a suitable unit to measure something in, you should first estimate how big it is. So, for example, do you think it's better to measure the distance between Aberdeen and Dumfries in metres or ...

In pre-kindergarten, children ages 3-5 develop a basic understanding of numbers and counting, and connect both to the idea of “how many.” Pre-k math tips work on recognizing, grouping, and comparing ...