THE STATISTICAL GUIDE FOR NEW YORK CITY SHOWS THAT, BETWEEN 1950 AND 1960, THERE WAS A NET LOSS OF WHITES WHO MOVED OUT OF THE CITY, AND A NET GAIN OF NONWHITES AND PUERTO RICANS WHO MOVED INTO THE CITY. THIS CHANGE IN ETHNIC COMPOSITION HAS CONTINUED INTO THE 1960'S AND HAS BEEN INCREASINGLY REFLECTED IN THE ETHNIC CHARACTER OF THE CHILD POPULATION ATTENDING PUBLIC SCHOOLS. DESPITE A SHIFTING POPULATION WITHIN THE CITY AND MIGRATION TO POINTS OUTSIDE THE CITY, THE NUMBER AND PERCENTAGE OF INTEGRATED SCHOOLS AND THE PUPILS IN THESE SCHOOLS HAVE INCREASED. THE INCREASE IS LARGELY ATTRIBUTED TO SEVERAL PROGRAMS OF THE BOARD OF EDUCATION FOR IMPLEMENTING ITS INTEGRATION POLICY. THESE INCLUDE OPEN ENROLLMENT POLICY, FREE CHOICE TRANSFER PROGRAMS, CAREFUL SITE SELECTION FOR NEW SCHOOLS, AND REZONING OF EXISTING SCHOOLS. WHILE INTEGRATED SCHOOLS HAVE INCREASED IN NUMBER, SCHOOLS OF PREDOMINANTLY NEGRO AND/OR PUERTO RICAN STUDENTS HAVE ALSO INCREASED. THE DEVELOPMENT OF HOUSING PROJECTS FOR LARGE FAMILIES IN GHETTO AREAS HAS SUBSTANTIALLY CONTRIBUTED TO THIS INCREASE. THE NUMBER OF PREDOMINANTLY WHITE SCHOOLS HAS DECREASED DURING THIS SAME PERIOD. THE FACT THAT NEW YORK CITY PARENTS HAVE THE OPTION OF CHOICE AMONG PUBLIC, PRIVATE, AND PAROCHIAL SCHOOLS, AND BECAUSE THE PRIVATE AND PAROCHIAL SCHOOLS ARE OVERWHELMINGLY WHITE, THE LARGE FRACTION OF NEGROES AND PUERTO RICANS IN PUBLIC SCHOOLS FAR EXCEEDS THEIR ACTUAL REPRESENTATION IN THE CITY AT LARGE.