By virtue of his function, a pastor is bound to take care of the catechetical formation of adults, youth, and children, to which purpose he is to use the help of the clerics attached to the parish, of members of institutes of consecrated life and of societies of apostolic life, taking into account the character of each institute, and of lay members of the Christian faithful, especially of catechists. None of these are to refuse to offer their help willingly unless they are legitimately impeded. The pastor is to promote and foster the function of parents in the family catechesis mentioned in can. 774, §2.
Source: Code of Canon Law (Vatican.va)