The Science & Education Research Center (SERC) at Carleton College provides access to high-quality teaching materials for those in the earth sciences. This particular resource offers materials designed to help teachers involve students in large and small lecture-based classes. The materials here were originally created for the Starting Point: Introductory Geology site for geology teachers and the contributing partners came from the College of William and Mary, the University of Kentucky, and several others. The site delves into its teaching philosophy in the section titled How to Give Interactive Lectures. The Examples area provides over 30 specific examples of activities (such as geologic puzzles) that can be used to create a highly engaging classroom experience.