This paper aims to offer a "liveable" theology for the Christian teacher; that is, it seeks to articulate a theology of teaching in contemporary contexts which can serve the spiritual and faith development of Christian teachers in their vocation. A first section gives some brief account of "teaching" in the Christian theological tradition, highlighting certain distinctive features of Christian teaching. In order better to read this tradition in our present contexts, a second section discusses the particular questions facing teaching in late modernity. In the light of what has gone before, a final part to the paper seeks to suggest ways forward for the development of a living theology for the Christian teacher. Here the theologies of baptism and lay vocation, of grace and of evangelization are drawn to the reader's attention as significant theological themes for Christian teaching today. (Contains 15 notes.)