Here's a great introduction to five famous astronomers for kids. See who got the star party started with this worksheet.

This worksheet is a quick-reference tool of space vocabulary for kids, with an exercise to use the words properly in provided sentences.

Get to know some of the friendly, furry, feathery river wildlife that live near American rivers, then match each one to its home.

Learn all about rivers--how they were formed, what they're made of, and what they do for us and the planet--in this reading and science worksheet.