Adult Education: A New Frontier in the Jewish Day School Movement? Tzvi Sinensky Rosh Yeshiva of the Gur Aryeh Program at Main Line Classical Academy, Director of the Lamm Heritage Archives, and Editor at The Lehrhaus. More posts by Tzvi Sinensky. Tzvi Sinensky 14 Mar 2017 • 1 min read Are we witnessing a new trend in day school education? Check out my newest piece up on The Lehrhaus. Would love to hear your thoughts!