Catechetical Literature (Catechesi Tradendae 49)

This is what I am striving for with my Praying the Mass series of catecheses on the Mass.  From Catechesi Tradendae 49:

One of the major features of the renewal of catechetics today is the rewriting and multiplication of catechetical books taking place in many parts of the Church. Numerous very successful works have been produced and are a real treasure in the service of catechetical instruction.

But it must be humbly and honestly recognized that this rich flowering has brought with it articles and publications which are ambiguous and harmful to young people and to the life of the Church. In certain places, the desire to find the best forms of expression or to keep up with fashions in pedagogical methods has often enough resulted in certain catechetical works which bewilder the young and even adults, either by deliberately or unconsciously omitting elements essential to the Church's faith, or by attributing excessive importance to certain themes at the expense of others, or, chiefly, by a rather horizontalist overall view out of keeping with the teaching of the Church's magisterium.

Therefore, it is not enough to multiply catechetical works. In order that these works may correspond with their aim, several conditions are essential:

1. they must be linked with the real life of the generation to which they are addressed, showing close acquaintance with its anxieties and questionings, struggles and hopes;
2. they must try to speak a language comprehensible to the generation in question;
3. they must make a point of giving the whole message of Christ and His Church, without neglecting or distorting anything, and in expounding it they will follow a line and structure that highlights what is essential;
4. they must really aim to give to those who use them a better knowledge of the mysteries of Christ, aimed at true conversion and a life more in conformity with God's will.