American Judaism has a boy problem. After several thousand years in which women were relegated to the sidelines of worship and community leadership, scholars and denominational leaders now say that women are significantly outnumbering men in numerous key segments of non-Orthodox Jewish community life. At the Reform movement's seminary, 60 percent of the rabbinical students and 84 percent of those studying to become cantors are female. Girls are outnumbering boys by as much as 2 to 1 among adolescents in youth group programs and summer camps, while women outnumber men at worship and in a variety of congregational leadership roles......