What is the liturgy? What does one mean by a grammar school? What has each to do with the other? The burden of this paper is to essay some answers to each of these questions, endeavouring to develop maturer concepts of education and liturgy, and to make practical suggestions about the place of liturgy in the life of the school. The liturgy has an important part to play in the Catholic education of all children, so that much of what I have to say will apply to other kinds of school, and it will apply for the most part equally to girls and boys, though I shall generally refer to boys. My own teaching experience in Catholic schools has been largely confined to the grammar school, but this is not the sole reason why I have preferred to speak of the grammar school and the liturgy. I believe that the grammar school offers exceptional opportunities not only for training its own pupils in a right sense and practice of liturgy, but also for assisting the whole Catholic body in this country to arrive at a more realistic understanding of the liturgical life of the Church.