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This is the second in a series of three professional development videos that correspond to lessons taught by Andrew Cloud, an Earth and Planetary Sciences teacher. Andrew’s class, a mixture of 9th and 10th graders, is an inclusion classroom he co-teaches with Barbara Brochstein. In this lesson, Andrew asks students to participate in an activity that illustrates the phases of the Moon. He asks one student to represent the Earth and another student, the Moon. The student representing the Moon makes one complete rotation or one full spin on their axis while standing in one spot. Andrew guides students to see that the Moon makes a full rotation in the same amount of time it takes to revolve around the Earth one time. The demonstration is followed up by a hands-on lab where students draw the placement of the moon in revolution and rotation. This resource is part of the NASA Planetary Sciences Collection.