McGuffey in Newark, Ohio. During the 2005-06 school year, she and a fellow teacher, along with about 100 students from Miller Elementary in Newark, successfully lobbied to get the Newark Earthworks named as the official Prehistoric Monument for the State of Ohio. In the fall of 2006 Mary participated in a Fulbright Teacher Exchange and taught at Greentrees Primary in Salisbury, England, where she worked with archaeologists in both Ohio and England on a project that examined the remarkable similarities between Stonehenge and the Newark Earthworks.