 He also taught Rabbi Meir Tzvi Bergman, today rosh yeshiva of Yeshiva HaRashbi and a son-in-law of Rabbi Elazar Shach.Rabbi Lefkowitz gave a regular daily "shiur" at the "yeshiva ketana" until his health declined in summer 2009; he continued to give "shiurim" and "shmuessen" (mussar talks) there until his final days.In the late 1990s, Rabbi Lefkowitz started a kollel for the study of "Tohorot", together with an evening kollel for in-depth study of this topic.