The NY Times has been doing a series on today's principals. Today's profile was of a woman, well, I'll let them tell you: When she first arrived to work at this imposing brick building in March 1963, John F. Kennedy was president, ZIP codes were not yet in use, and the nearby Verrazano-Narrows Bridge was still under construction. She has outlasted more than a dozen schools chancellors, who made what she described as “little changes here and there,” and watched a student body dominated by the children of Italian immigrants transform into one that is 45 percent Asian-American and 18 percent Hispanic. Madeleine P. Brennan has been principal at Dyker Heights Intermediate School 201 in Brooklyn for 48 years. Experts believe she may be the longest serving principal in the country.