Students learn about the phases of the moon by acting them out. In 30 minutes, they will act out one complete, 30-day, moon cycle. Materials Pencil (one per student) White Styrofoam ball (one per student) - 5 centimeters or larger Light source, such as a lamp (shade removed) with a bright, clear, incandescent bulb (100 watts or higher) Management Select a dark room for this activity and move desks and other objects out of the way so that students can move around the room freely. In preparation