sentences:  Both Cheryl and her two daughters have graduated from Chula Vista's Hilltop High School.Cox received a Master's degree in Political Science from San Diego State University and a Doctorate in Education from the University of Southern California.She worked for 30 years as a teacher, principal, and administrator in the Chula Vista Elementary School District; she was also an assistant professor at National University before being elected to the Chula Vista Elementary School District Board of Trustees in 2000.