The Blue Marble.Original caption: "View of the Earth as seen by the Apollo 17 crew traveling toward the moon. This is the first time the Apollo trajectory made it possible to photograph the south polar ice cap.
This place has some great science and history ideas for the third grade. These could be edited to work with a higher or lower grade. Third Grade Thinkers: Science: Earth Cycles Need to make sure its accurate to prevent misconceptions!
Literary Hoots: Constellations & Astronomy for Kids Observe that the patterns of stars in the sky stay the same although they appear to shift across the sky nightly, and different stars can be seen in different seasons.