Heather Adamson

Tells the story of how Charles Darwin developed his controversial theory of evolution bas...

Tells the story of Christa McAuliffe and the six other NASA astronauts who lost their liv...

There's more than one way to count! Skip counting shows you a shortcut by counting in set...

Want to split an apple? Half for each. That's a fraction! A fraction is a part of somethi...

Estimating is a smart way of guessing the number of something. Discover tips and tricks t...

Likely or unlikely? Possible or impossible? Probability is how likely something is. Will ...

How tall will my sunflower grow? How long is Fido’s leash? Learn how rulers and odo...

How much water does it take to fill the fishbowl? How much milk do you need for your cere...

How many caramels in a pound? Who caught the biggest fish? Learn how balances and scales ...

How many hours do you sleep? How many minutes does it take to eat your cereal? Learn how ...

How big was the worlds biggest cookie? How many dominoes were used in the longest domino ...