When Jesus instituted the Eucharist he gave a final meaning to the blessing of the bread and the wine and the sacrifice of the Lamb. The Gospels narrate events that anticipated the Eucharist. The miracle of the loaves and fish, reported in all four Gospels, prefigured the unique abundance of the Eucharist. The miracle of changing water into wine at the wedding feast in Cana manifested the divine glory of Jesus and the heavenly wedding feast in which we share at every Eucharist.
USCCB

Generally, at Saint Therese First Holy Communion is received in the 2nd grade. 1st grade is required. Other circumstances are handled individually to meet the students' and families' needs. The "Special 1st Comm Prep" classes listed on the Faith Formation Schedule are for students beyond the 2nd grade to prepare for 1st Reconcilation and 1st Communion. Parents attend these classes with their student.