High schoolers engage in a historical review, starting with the existence of the horizon at sea, proceeding to various studies of the Earth's size and shape, and leading to the attempt by Columbus to reach India by sailing westward.

Third graders discuss how Aristotle concluded that the Earth was round. As a class, they review theories about the Earth's shape and describe how life on Earth would be different if it were flat. Individually, they make a moon book in...

In this longitude worksheet, students read about how to determine the longitude of location while at sea and they answer 5 questions about calculating longitude.

Pupils play the dating game by going to the website given by the teacher. They also are presented with the powerpoint, done the m&m simulation, and determine the age of the mummified seal and man.

In this adobe activity, students read about adobe soil and how it was used for building because of its insulating properties. Students complete 3 short answer questions.

This lesson plan is designed to have young children explore the concept of sinking vs. floating by using the skills of prediction, observation and classification.