In Part I of this two-part series (published in the March 2009 issue), the author traced the evolution of the Brothers of the Christian Schools' (Christian Brothers in the United States) understanding of how they related to the lay people with whom they increasingly shared their apostolate of Catholic education. From a stance of wary distance in the 18th and 19th centuries, the Brothers increasingly accepted the reality of the presence of lay teachers in their schools by the middle of the 20th century. In the wake of the renewal occasioned by Vatican II, the Brothers began a process of self-examination and reflection on their apostolic identity and finality that dealt directly with the question of their corporate relationship with the laity that increasingly staffed and administered what were now called Lasallian schools. In the second part of this series, the Brothers' 41st General Chapter of 1986 is the starting point for a detailed analysis of how they developed the paradigm of shared mission that has radically reshaped the Brothers as a congregation and the landscape of relationships within the institutions they help to animate. This conceptual framework has profound roots in the theology of the apostolate of the laity described at Vatican II (Vatican Council II, 1966) and is embraced in the Brothers' own documents of renewal (Brothers of the Christian Schools, 1967/1994). It offers a powerful example of theological reflection and apostolic action for lay people and vowed religious who today share the mission of Catholic education. This article reviews the recent struggle of the Christian Brothers to develop the concepts of Lasallian schools and shared mission as a means to invite and incorporate the full and active collaboration of lay men and women in the ministry of Catholic education. [For Part I, see EJ934014.]