@online {173, title = {The American Geological Institute - News and Resources for geoscientists and teachers}, publisher = {AGI}, keywords = {$\#$EducationalResources, $\#$ProfessionalDevelopment, activities, classroom, curricula, earth science, education, GEOLOGY, K-12, lesson plans, news, schools, standards, teacher resources, teaching}, url = {http://www.agiweb.org/index.html} }