**Practical Uses of Math and Science**

**A collection of brief examples showing how math and science**

**topics taught in K-12 classes can be used in interesting settings, **

**including every day life.**

## Featured PUMAS Example

### How Many Days Are in a Year?

View the full ExampleBackground: The true length of a year on Earth is 365.2422 days, or about 365.25 days. We keep our calendar in sync with the seasons by having most years 365 days long but making just under 1/4 of all years 366-day "leap" years. Exercise: Design a reasonable calendar for an imaginary planet. Your calendar will consist of a pattern of 366-day "leap" years and 365-day regular years that approximates your planet's average number of days per year.

## View Our Examples

The PUMAS examples are aimed primarily at helping pre-college teachers enrich their

presentation of topics in math and science.