Leadership Most kollels have a scholar serving as a
rosh kollel, or head of the kollel. Modest stipends, or the salaries of their working wives, and the increased wealth of many families have made kollel study commonplace for yeshiva graduates. The largest United States kollel is at
Beth Medrash Govoha in
Lakewood, New Jersey. More than 4,500 kollel scholars are attached to the yeshiva, which has 6500 students in total. Large kollels also exist in
Ner Israel Rabbinical College, numbering 180 scholars, and in
Yeshiva Rabbi Chaim Berlin, with more than 100 scholars. In the
Israeli
Haredi Jewish community, thousands of men study full-time for many years in hundreds of kollelim. Kollel has been known at times to cause a great deal of friction with the secular
Israeli public at large. It has been criticized by the
Modern Orthodox, non-Orthodox, and secular Jewish communities. The Haredi community defends the practice of kollel on the grounds that Judaism must cultivate Torah scholarship in the same way that the secular academic world conducts research into subject areas. While costs may be high in the short run, in the long run the Jewish people will benefit from having numerous learned laymen, scholars, and rabbis. (See also:
Religious relations in Israel) Yeshiva students who
learn in kollel often continue their studies and become
rabbis,{{cite web |title=Kollel Toronto |url=https://www.kollel.com/history |date=January 11, 2017 ==Community kollelim==