Dinah Costello teaches English at Ridgway High School, born in San Francisco she graduated from Lincoln High School. Dinah attended San Francisco City College and graduated from San Francisco State University. Dinah credentials are Standard Elementary and High School, English, Physical Science and a Master's degree in education. Dinah's past experience includes thirteen years in the District. She has taught at Piner, Grace,Montgomery, Maria Carrillo, Nueva vista and Lewis Opportunity.