Delia T. Garrity was a public school educator for 37 years, serving as a math teacher, teacher of the gifted, mathematics department chairperson, curriculum supervisor, assistant principal, and assistant superintendent. During her tenure as assistant superintendent for curriculum and instruction in Rockville Centre School District, New York, she provided the leadership in opening academic doors to all students and designed a comprehensive professional learning model for teachers and administrators. As assistant principal of South Side Middle School in Rockville Centre, Delia facilitated the school's transformation from a tracked system to one that offers an honors curriculum in heterogeneous classes for all students. She received the New York State Middle School Assistant Principal of the Year Award in 1996. She has taught graduate courses on mathematics education at Long Island University and is a guest lecturer at Teachers College, Columbia University. She is a national educational consultant and presenter who works with educators to create equitable heterogeneous classrooms where each student, including special education students, English language learners and gifted students; receives the same high quality, rich education. She coauthored Detracking for Excellence and Equity, with Carol C. Burris and authored or coauthored articles in American School Board Journal, The School Administrator, and The Arithmetic Teacher.