NASA
Earth, Can You Hear Me Now?
How long did you say? Class groups plot the distances between Earth and Mars and determine the trigonometric function that models the data. Using a calculator, they graph the function to determine when the distance and communication...
Messenger Education
Exploring Exploring
The reason people first began trading was because of their desires for objects other societies possessed. In the activity, classes discuss why exploration has been a common thread in all societies and where these desires have taken...