Teaching Great Lakes Science is your source for science, technology, engineering and math! This website features a suite of lessons, activities and data sets focused on the Great Lakes. Any of these resources may be easily incorporated into formal and informal educational settings. All the lessons, activities, teacher tools and data sets are free and targeted for 4-12th grades. Throughout the site, content is organized to allow you to work through a complete module or mix and match components based on your needs. Browse by type or resource, broad-concept topic (e.g., earth science), or by specific topic. Grade levels are highlighted after the title of each lesson. The Teacher Tools Section includes an overview of teaching methods, focusing on guided inquiry.