Tapes help greatly. I would listen to my tapes on the way home from work and sing along. I still have my tenor tape for the Vittoria. Please excuse my Latin. I did it from memory. We have also sung the Vittoria “Ave Maria”.
The point about kids is well taken. During Lent, our cathedral parish reverted back to the Kyrie, Sanctus, and Angus Dei ( I wish I could give you the setting - it was in Worship III, but it was the same one we used when I was a kid back in the 50s). Neither of my two kids had any problem. Since then the parish has added the Parce Domine and Attende Domine for Lent.
How many baby boomers does your parish have who can remember what Mass was like before 1965 when we went to the hybrid mass (Latin and English) before making the full transistion to the NO?