This paper identifies several factors that lie within and external to the teaching act that have an impact on the quality of instruction that students can potentially receive, which in turn has implications for the extent to which students can engage in appropriate practice. These factors all exist on a continuum from limiting to enhancing, and we could hypothesize that they regulate the possibilities for practice that are afforded to students and that this practice time is considered in the development of competent movers in physical education. These factors are contextual, such as time, class size, and teaching resources; curricular, relating to the content and pedagogy of physical education; and instructional, such as teacher effectiveness and content knowledge.