Curated OER
Earth
First graders define what a planet is and study the planet earth. They examine the effects of the sun on the earth and make a model.
Fourmilab Switzerland
John Walker: Solar System Live
This planetarium program allows you to create an accurate model of the solar system with icons or pictures of each planet. You can specify a date in the past or the future, change the viewpoint to any latitude/longitude, and even view in...