This is a very useful way to help the students understand and be able to map out the orbit and relationship between the Earth, Moon and Sun. This will help when transitioning into discussing the seasons.
The moon passed between Nasa's Deep Space Climate Observatory and the Earth, allowing the satellite to capture this rare image of the moon's far side in full sunlight. We normally don't see this side of the moon. As the moon is tidally locked to the earth and doesn't rotate, we only ever see the one face from the earth. Awesome shot!