This document describes the Social and Emotional Learning (SEL) implementation process and key factors influencing its success. The process is described first in a one-page graphic, then in a brief summary, and finally through presentation of the full rubric. All three show a sequence of ten steps over three phases of implementation, along with a set of ongoing sustainability factors in every phase that serve to enrich and sustain SEL programming. The summary and full rubric also provide key indicators and rationales for each step. Finally, the full rubric describes levels of performance for each indicator to illustrate stages of progress to determine where a school stands in the implementation process, where it might go next, and how to get there. Throughout, the rubric is derived from the literature on research and practice not only on SEL and prevention but also on broader school change and reform. Thus the rubric can be applied to a variety of school change efforts.