In many states, physical education classes must compete and rotate with music, art, computer lab, library, and/or counseling. To meet state-mandated minimum weekly time requirements, some districts choose to have all students of a particular grade in physical education at the same time (often to accommodate the classroom teachers' requests for a common planning period). This practice, however, sometimes results in huge classes of 100+ students. Meanwhile, other districts opt for "quality" over "quantity," resulting in single or double-sized classes, in which students receive physical education every other day, every third day, or even every fourth day. Regardless of how often or how rarely the physical educator sees his/her students, the amount of time children participate in vigorous physical activity is critical, and teachers have much control over vigorous physical activity during physical education class. The quality of the movement experiences is critical as well, however this article focuses solely on the amount of movement children have during physical education class. Teachers should strive for students to be vigorously active more than 50% of the classtime. Vigorous activity improves the ability of students to think in academic areas, and it reduces off-task behaviors. (Contains 1 table.)