Hmm, pretty hard to do over the Internet. Is there a place nearby where you can hear the Divine Office in Gregorian chant?
Besides teaching, you’ll need an antiphonary with Gregorian antiphons. You’ll also need to learn the psalm modes and how they work with the Latin accents. That takes a while, and a lot of practice.
However a good start would be this:
- get a copy of Liber Hymnarius; it contains all the hymns for the Office. You can buy it here: Liber Hymnarius
- Obtain a copy of this CD from here: CD Les Heures Grégoriennes
That CD includes all the first stanzas of the hymns of the Office, as well as all the antiphons and first verses of psalms in the mode accompanying the antiphon.
That should get you started on how to chant the hymns, and how to psalmody.
The next part: what to do about the rest of the Office.
You have several choices: you can, for now, chant the antiphon “recto-tono” (on the same note) and the psalms “in directum”, a very simple and easy to learn psalm tone. That will get you used to reading and pronouncing the Latin (in fact start by reading in Latin only); you won’t need any books with chant notation to do this as In Directum is very easy to chant without the notes.
Or, if you do the Monastic Office, you can buy the three first volumes of the Monastic Antiphonary here:
Chant Book Catalogue
Lastly, if you do the current 4-week Liturgy of the Hours (Roman Office), you can do Vespers for Sundays, feasts and solemnities with this book:
Antiphonale Romanum II
The latter choice is good, as it includes the hymns, so you won’t need to buy the Liber Hymnarius. But it limits you to Sundays and Feasts of the Roman Office. But it is designed for “beginners”, as all the psalms are pointed making them much easier to chant (pointing means they are marked at the inflections where the melody changes).
A couple of good CDs would help too. I recommend from this page
CDs
Vespers and Compline (compline will teach you how to psalmody “in directum”, and Vespers has the Sunday hymn for Vespers as well as a few psalm modes), and Learning About Gregorian Chant.
Good luck and God bless, a worthy enterprise indeed, if not easy at the start.