THIS STATISTICAL REPORT TRACES THE CHANGING PATTERN OF MIGRATION BOTH INTO AND OUT OF NEW YORK CITY SCHOOLS OVER THE PAST 10 YEARS. PRESENTED IN TABULAR FORM ARE CITYWIDE DATA ON THE DEMOGRAPHIC MOVEMENT FROM WITHIN AND OUTSIDE THE CONTINENTAL UNITED STATES AND ON THE MIGRATION BALANCE AS OF 1964. A SUMMARY POINTS OUT THAT THE TREND HAS BEEN TOWARD INCREASING IN-MIGRATION, FOR THE MOST PART FROM WITHIN CONTINENTAL UNITED STATES. PUERTO RICAN IN-MIGRATION HAS DROPPED FROM ITS PEAK IN 1956-57. MIGRATION OUT OF THE CITY HAS BEEN MORE STABLE, BUT THOSE WHO DO LEAVE ARE MADE UP PRIMARILY OF PUPILS MOVING TO AREAS ADJACENT TO THE CITY AND TO PUERTO RICO. THE NET CHANGE SHOWS AN ANNUAL LOSS OF ABOUT 3,000 PUPILS. IT IS NOTED THAT THERE IS ALSO CONSIDERABLE TRANSFER WITHIN THE CITY. THE SCHOOLS ARE FACED WITH INCREASINGLY SEVERE PROBLEMS RAISED BY THE LANGUAGE AND SOCIOECONOMIC HANDICAPS OF THE IN-MIGRANTS, MOST OF WHOM ARE NON-ENGLISH SPEAKING FROM DISADVANTAGED BACKGROUNDS. ABOUT ONE OUT OF EVERY 10 NEW YORK CITY PUPILS REQUIRES A SPECIAL INSTRUCTIONAL PROGRAM. (NH)