@online {167,
	title = {Schoolyard Geology},
	publisher = {USGS},
	abstract = {This website is filled with activities and examples of what to look for to turn your schoolyard into a rich geologic experience.},
	keywords = {$\#$EducationalResources, $\#$LessonPlans, activities, classroom, curricula, earth science, education, K-12, lesson plans, schools, standards, teacher resources, teaching},
	url = {http://education.usgs.gov/schoolyard/}
}
