NASA
National Aeronautics and Space Administration: Scijinks: Seasons
An explanation about the rotation of the Earth and why the Earth has seasons.
Other
Nasa: Iss Earth Kam
Students get a whole new perspective of the world through images obtained from the International Space Station. Students can even request images to be taken through ISS EarthKAM. Activities and educator guides are provided.
Ohio State University
Beyond Penguins and Polar Bears: Common Misconceptions About Day and Night
Misconceptions about the causes of seasons and day and night are common through all ages. Use the information on this site to help your students understand these concepts. Included are links to many resources and lesson plans for...
National Museums Liverpool
Liverpool Museums: The Sun Tracker
This simulation allows the user to see the sun's arc in the sky anywhere in the world at any time. By changing the season settings the user can see how seasons affect the height of the sun's arc.