Arguing that the traditional Jewish day-school model they grew up with is outmoded and too clannish for 21st-century Judaism, a new generation of parents and educators are flocking to Montessori preschools and elementary schools that combine secular studies with Torah and Hebrew lessons. In Brooklyn, whose more than 600,000 Jews include secular Jews in brownstone Brooklyn and Hasidic Jews in Borough Park and Williamsburg, four Montessori schools have opened in the last decade. Each is tailored to a different group: one is for Hasidic girls in Borough Park, another for Hasidic boys in Midwood; Lamplighters Yeshiva's students are mainly Chabad-Lubavitchers, while Luria Academy's students range from secular to Hasidic.