This site provides pictorial lessons on our solar system and the universe, with accompanying lesson plans for teachers or homeschooling parents.  The Level 1 material is for students in grades K-8.  The Level 2 material is written for students in grades 9-12.  Accompanying the lessons are a glossary and links to other resources.

High school students should also check out the related site Imagine the Universe! for more extensive resources and to get answers to your astronomy questions.