Currently the PUMAS collection contains **84** examples.

The PUMAS examples are aimed primarily at helping pre-college teachers enrich their presentation of topics in math and science.

- You may find
**a number of examples**that relate to your area of interest, perhaps written in different styles, and possibly taking different approaches to the material. There may also be**comments/lesson plans**filed with some of the examples, written by previous users. **Use these examples as a**-- Select, adapt, recontextualize, and present the material to your students in a way that you judge will best meet your students' needs, abilities, and interests.*resource*- You may have ideas related to a particular example that might be helpful to subsequent users. There is an opportunity, on the "Display an Example" page associated with that example, for you to
**submit your comments/lesson plans**. - PUMAS examples are
**citable references**. If you use material from PUMAS examples in other work, please cite them appropriately, e.g.: Chambers, L.H., "How Now, Pythagoras?", 07_10_98_1, The PUMAS Collection, http://pumas.nasa.gov, 1998.

Important header content can be searched by using the **Search** box in the upper-right-hand corner of your screen.

This is a good way to start, or to find examples added after a certain date. **Click links below** to get the list of all the **PUMAS Examples**, arranged by that field.

by Title | by Grade Level | by Date Accepted | by Keywords | by Benchmarks

*Go-to:** A B C D E F G H I J K L M N O P Q R S T U V W X Y Z*

- Geometry to the Rescue: A Story in Pictures
- How Now, Pythagoras?
- It's Raining Cats and Dogs...and Fish and Frogs...and Birds
- Logarithms: Taking the Curve Out

- What the Doppler Effect Tells Us About Distant Stars and Planets
- Studies of a Population of Stars: Distances and Motions
- Studies of a Population of Stars: How Bright Are the Stars, Really?
- How Big Is the Earth?
- Color and Spectrum
- Earth Turns? Prove It!
- Length of the Day
- Sand or Rock? Finding Out from 1,000 km
- Seeing Interference Fringes
- Studies of a Population of Stars: Mapping the Positions of Stars
- Seeing Interference Fringes with a Telescope
- The Moon Orbits the Sun?!?!
- When a Ruler Is Too Short
- Why is Summer Hot?
- Why Is There a Tidal Bulge Opposite the Moon?

- Can an Astronaut on Mars distinguish the Earth from its Moon?
- Snowmelt and Floods
- Determining the Altitude of Iridium Flares

- Square Root of 2: Irrational, Yes! Impractical, No!
- Why Tailgating on Freeways is Unsafe: A Real-life Example Using Quadratic Equations
- Algebra Magic - Create Your Own Number Puzzles

- Lower Calories, Lower Fat: Making a Healthier Cake Without Loss of Taste
- Ice Sheets and Sea Level Rise

- Cross Section and Slope
- Hypothermia in the Little House
- Particle Man and the Photon
- Preventing Hypothermia
- There's Air in There!
- Contouring and Topo Maps
- Mixing and Stirring

- Modeling the Motions of the Earth, Moon and Sun
- The Cause of the Phases of the Moon
- The Mathematical Implications of Lying
- The Rubber Band Problem
- The Cause of the Earth's Seasons