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Become a nitrogen atom in the nitrogen cycle in our Traveling Nitrogen Classroom Activity Kit/Game. See all our games, activity kits and classroom activities.

Leonardo Fibonacci

Leonardo Fibonacci was an Italian mathematician who lived between 1170-1240. He travelled a lot on business with his father and was exposed to many different mathematical techniques used in western Europe, Asia, and northern Africa. Fibonacci accumulated techniques in arithmetic, algebra, and geometry during his travels, and compiled them in books, for people to learn without having to travel as he had. His writings also introduced Arabic numerals into European mathematics.

Fibonacci made significant contributions to mathematics himself, in number theory and in recursive sequences. He is most famous for the sequence bearing his name, in which each number is the sum of the previous two.


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Cool It! Game

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Joanna Hubbard

This is my 10th year with the Anchorage School District as a science teacher, currently working with K-12 teachers around the district rather than in a classroom. My most recent classroom time was as a...more

Thomas Edison

Thomas Edison was an American inventor who lived between 1847-1931. He patented 1093 inventions in his life, including the incandescent light bulb, which provided a practical means of electical lighting...more

Williamina Fleming

Williamina Paton Stevens Fleming was a Scottish-American astronomer who lived from 1857-1911. She discovered 10 of the 24 novae then known. Novae are stars whose brightness suddenly increases then slowly...more

Jocelyn Bell Burnell

Jocelyn Bell is a British astronomer who was born in 1943. She discovered pulsars in 1967. Burnell was a graduate student at Cambridge University when she discovered pulsars. Her advisor, Tony Hewish,...more

Understanding Sharks

This expedition has been an exciting adventure for the whole family. Every day started by waking up with the sunrise, diving during the day, contemplating the sunset and working on the project. Being in...more

Wangari Maathai

"We have a special responsibility to the ecosystem of this planet. In making sure that other species survive we will be ensuring the survival of our own." - Wangari Maathai Wangari Maathai, a Kenyan scientist,...more

Penguin Colonies

This is Ross Island, a volcanic island embedded in the Ross Ice Shelf, Antarctica. Adelie penguins are found all around Antarctica, but we will be filming the documentary at the breeding colonies shown...more

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF