And so, my fellow Americans: ask not what your country can do for you—ask what you can do for your country. And so begins your invigorating, innovative learning experience in the JFK Challenge app! Learners...

Every year, the moon moves 3.8 cm farther from Earth. In the 11th part of 22, classes use the distance formula. They determine the distance to the moon based upon given data and then graph Galileo spacecraft data to determine its movement.