Catechism of the Catholic Church §906 — excerpt
Lay people who are capable and trained may also collaborate in catechetical formation, in teaching the sacred sciences, and in use of the communications media.
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, cann. 229 · 774 · 776 · 780 · 823 # 1
