Phone: 610-544-5700 ext. 8510


Degrees and Certifications:

Certifications: * Elementary Education, * Reading Specialist (K-12), * Secondary Social Studies Education: * Master of Arts in Reading from West Chester University * Bachelor of Arts in American History from Widener University

Mrs. Mary Costello

     Mrs. Costello has worked at SRS since 2012.  Before that she worked at Strath Haven Middle School and Ashland Middle School.  She and her husband, John, live in Prospect Park with their two dogs, Bailey and Ollie.  Mrs. Costello likes reading mysteries, watching historical series on PBS, and most of all, she enjoys spending time with her grandson, Sean.