"The level of classroom dialogue is amazing The teachers have a great depth of knowledge in the subject area. The students are bright, confident, articulate and engaged.." DAVID HORVICK / GFS PARENT AND VETERAN OF SEVEN ESSENTIALLY ENGLISH CLASSES >> Rita Goldman, Principal; Michael Williamson, Upper School Dean of Faculty Karen Barbarese, Admin. Asst.,Upper School Office: 215-951-2315 Matt Zipin,Technology Coordinator, mattz@gfsnet.org.