In the boys’ classroom at Lamplighters Yeshivah in the Hasidic Jewish stronghold of Crown Heights, Brooklyn, Montessori number-counting boards and decimal beads share space with Hebrew-learning materials. A colorful timeline on the wall shows two strands of world history in parallel: secular on the left, Jewish on the right. A photo of the grand rabbi of the Chabad-Lubavitch Hasidic movement hangs above a list of tasks that children perform individually: make a fractions poster, practice cursive, learn about the moon’s phases.
Into the classroom on a recent morning came Rivkah Schack, one of the school’s principals, holding a tool whose form, if not its content, would be familiar to any Montessori teacher: a small nomenclature booklet in which the students were to write words from the Bible by hand and illustrate them. In secular Montessori, the booklets might be used to teach botanical terms; here, they were for Hebrew.
“Not to mix our metaphors, but that’s our holy grail,” said Ami Petter-Lipstein, the director of the Jewish Montessori Society, based in Highland Park, N.J., as Ms. Schack gathered a few pupils around her on the rug for a group Hebrew lesson.