High amounts of sedentary behavior have negatively impacted the health and well-being of children in the United States. Sit-to-Stand desks are desks that allow students to move and engage more in the classroom setting. We plan to implement a Sit-to-Stand desk trial in an elementary school classroom to evaluate the impact these desks have on physical activity and sedentary behavior, and academic performance as compared to a classroom that uses traditional sitting desks.