Winnetka Parents Institute presents: Differentiation in Winnetka - Session 1. January 20, 2010. Presenters include Julie Pfeffer, Director of Curriculum and Instruction, and teachers from throughout the District: Jean Bierner (Carleton Washburne School and Hubbard Woods School), Lora Gettleman (The Skokie School), Betsy Steele (Crow Island School), Peggy Bourke (Crow Island School), Eileen Goodspeed (District), Charlotte Murphy (District), Libby Jones (The Skokie School), Jen Fiegen (Crow Island School)