Learners use small objects as a unit of measurement for larger objects. Working in small groups, they measure the circumference of smaller spheres and estimate the circumference of larger spheres using these measurements. Students...

Sixth graders explore angles, triangles, and investigate the circumference of the earth. They participate in a Webquest, access data bases, and communicate with other students through an on-line project site involving the circumference...

Third graders develop questions they have about the solar system. After being read a book, they view and discuss different constellations in the sky. In groups, they are given a piece of butcher paper and glow in the dark crayons in...

Learners examine what Eratosthenes is and the history behind him.  In this earth lesson students complete a hands on activity to repeat Eratosthenes' experiment.