Welcome! I am Mrs. Cratty. I teach Chemistry and Concepts of Chemistry at Knoch High School. I have taught at Knoch School District since 2008. Before coming to Knoch School District, I taught high school Biology at Greenfield Academy in Wilson, NC and taught Physics, Chemistry, and Environmental Science at the Yeshiva schools of Pittsburgh. I also have research experience with the VA medical center, the University of Pittsburgh, the Mayo Clinic in Scottsdale, Arizona, and the National Park Service. I received my Masters of Arts in Education from California University of Pennsylvania and my Bachelor's degree in Biology from Allegheny College.