Ample research demonstrates the power of comprehensive induction to develop and retain new teachers. Education scholars generally agree on what powerful systems of induction include, yet few tools exist for guiding schools in creating such systems. Drawing on theory and practice, we have created such a tool. This article introduces the "Continuum of Practices for Building Comprehensive School-Based Induction", a detailed description of exemplary comprehensive school-based induction and its stages of development. It is an educative document, a formative assessment tool, a discussion prompt, and an articulation of theory. We describe the ideas that underpin the continuum, its development, and its potential use. (Contains 3 footnotes and 1 table.)