No two galaxies are alike, help telling them apart, informational galaxy games http://amazing-space.stsci.edu/capture/galaxies/
4th grade visit to the outer planets http://www.enchantedlearning.com/subjects/astronomy/planets/
4th: The Seasons and Axis Tilt http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Sasons.shtml
Weather CNN http://www.cnn.com/WEATHER/
3rd grade Moon and 4th grade moon http://www.enchantedlearning.com/subject/astronomy/moon/index.stml
Virtual Moon Phases http://tycho.usno.navy.mil/vphase.html
US time zones http://www.worldtimezone/time-us12.html
5th Craters on Eros http://www.thursdaysclassroom.com/17feb00/cratersgalore.html
Orbit and Gravity 4th Orbit and gravity http://www.sciencemonster.com/gravity_inertia.html http://www.learn.co.uk/default.asp?WCI=Unit&WCU=8015
Sun for 3rd http://www.nasa.gov/audience/forkids/activities/CS_Our_Star_Our_Sun.html
The Gaseous giants http://www.sciencemaster.com/jump/space/giants.php
Your weight on other planets http://www.exploratorium.edu/ronh/weight/
The nine planets http://www.nineplanets.org/
animated, talking site from NASA, for kids, describing the reason for the seasons http://kids.msfc.nasa.gov/news/2001/news%2Dautumnalequinox.asp
http://www.physics.nau.edu/~tegler/research/ub313.htm
3rd grade Earth'ss Seasons http://www.enchantedlearning.com/subjects/astronomy/planets/earth/Seasons.shtml
Planetary Photojournal http://photojournal.jpl.nasa.gov/index.html