"Luther's Small Catechism" is a catechism written for the training of children. It reviews the Ten Commandments, the Apostles' Creed, the Lord's Prayer, the Sacrament of Holy Baptism, the Office of the Keys and Confession and the Sacrament of the Eucharist. The Small Catechism is widely used today in Lutheran churches as part of youth education and Confirmation.
"Luther's Large Catechism" was addressed particularly to clergymen to aid them in teaching their congregations. It is divided into five parts: The Ten Commandments, The Apostles' Creed, The Lord's Prayer, Holy Baptism, and The Sacrament of the Eucharist. The Large Catechism typifies the emphasis which the churches of the Augsburg Confession placed on the importance of knowledge and understanding of the articles of the Christian faith. Primarily intended as instruction to teachers, especially to parents, the Catechism consists of a series of exhortations on the importance of each topic of the Catechism.