Catechism of the Catholic Church §902 — excerpt
In a very special way, parents share in the office of sanctifying "by leading a conjugal life in the Christian spirit and by seeing to the Christian education of their children."
This translation is under copyright, so only the cited words are quoted here. Follow the link for the full text. Translation: English translation of the Catechism of the Catholic Church, 2nd ed. (Libreria Editrice Vaticana), as posted at vatican.va.
Also cites: CIC, can. 835 # 4