Introductory geoscience activities for K-2 classrooms.
Find helpful worksheets and projects for your classroom at Earth Science Resources.
The United States Geological Survey has extensive resources for K-12 teachers. Divided by grade level, these include lesson plans, activities, and multimedia resources for your study of rocks and minerals, including a unit on Schoolyard Geology.
An engaging interactive on rock types and the rock cycle from Annenberg Learner.
The Smithsonian's Museum of Natural History has excellent earth science resources for grades 5-8.