Why is catechism teaching important? This article gives nine reasons to pursued you on the importance of teaching the catechism. 

This article gives nine reasons for the necessity of the Catechism (whether the Heidelberg Catechism, the Westminster Shorter Catechism or Westminster Larger Catechism, or otherwise).

This is the introduction Zacharias Ursinus wrote to his commentary on the Heidelberg Catechism in the 16th century. It looks at the practice and importance of teaching from the Heidelberg Catechism.