All believers participate in the Church’s catechetical mission. Parents and guardians are the most influential agents of catechesis for their children. Some are called to more specific catechetical roles. Bishops are primarily responsible for catechesis. Priests share the teaching role of the Bishop and are his immediate collaborators. Catechists assist bishops and priests in the catechetical mission. Catechists include: deacons, Catholic school principals and faculty, parish religious education personnel, youth ministers and campus ministers. The Office for Catechetical Formation assists in the preparation and ongoing formation of catechists.