CCD

CCD (or C.C.D.) stands for "Confraternity of Christian Doctrine"

• an organization devoted to Catholic religious teaching, or catechism
• "CCD" became the common reference to extracurricular classes at Catholic parishes
  • especially for public school students, whose parents were instructed by the Church to send their children to "CCD"

Catholic teaching

• now commonly referred to as:
  • "Religious Education"
  • "Confirmation class"
  • Rite of Christian Initiation for Adults (RCIA)

Confraternity of Christian Doctrine

• established in 1562 for the purpose of religious teaching

• before then, catechesis was primarily conducted through
  • the Apostles Creed
  • the Lord's Prayer
  • Ten Commandments
  • Sacraments
  • Virtues and Vices
• in 1905 Pius X mandated CCD classes at every parish

References

see:

• The Confraternity of Christian Doctrine (catholicexchange.com)
• Catholic Encyclopedia (1913) Confraternity of Christian Doctrine

• https://stmarysofellis.org/faith-formation/ccd