A Brief Catechism for Adults - Lesson 6: Angels and Devils
A Brief Catechism for Adults - Lesson 7: Human Beings and the Purpose of Life
A Brief Catechism for Adults - Lesson 8: Sanctifying Grace
A Brief Catechism for Adults - Lesson 9: Heaven
A Brief Catechism for Adults - Lesson 10: Mortal and Venial Sin
A Brief Catechism for Adults - Lesson 11: Hell
A Brief Catechism for Adults - Lesson 12: Purgatory
A Brief Catechism for Adults - Lesson 13: Original Sin
A Brief Catechism for Adults - Lesson 14: Jesus Christ, Our Savior
A Brief Catechism for Adults - Lesson 15: Jesus Christ, True God and True Man
A Brief Catechism for Adults - Lesson 16: The Catholic Church is the Only True Church
A Brieft Catechism for Adults - Lesson 17: Qualities of the Catholic Church
A Brief Catechism for Adults - Lesson 18: The Pope, the Vicar of Christ
A Brief Catechism for Adults - Lesson 19: The Seven Sacraments
A Brief Catechism for Adults - Lesson 20: The Sacrament of Baptism
A Brief Catechism for Adults - Lesson 21: The Sacrament of Confirmation
A Brief Catechism for Adults - Lesson 22: The Sacrament of the Holy Eucharist (Holy Communion)
A Brief Catechism for Adults - Lesson 23: The Sacrifice of the Mass
A Brief Catechism for Adults - Lesson 24: The Sacrament of Penance (Confession)
A Brief Catechism for Adults - Lesson 25: How to go to Confession
A Brief Catechism for Adults - Lesson 26: Indulgences
A Brief Catechism for Adults - Lesson 28: The Sacrament of Holy Orders (Priesthood)
There are three levels of ordination celebrated in the encompassing Sacrament of Holy Orders.
Diaconate (Deacon)
Presbyteral (Priest)
Episcopal (Bishop)
Thus the title with only the word, priesthood is misleading in my opinion.