Data from the Educational Longitudinal Study of 2002 were used to compare 11,000 high school students on school size, time spent participating in extracurricular activities (ECA), and hours spent in employment. Findings indicated that students from small schools spent more time participating in ECA than students from larger schools for equivalent work hours. Unexpectedly, seniors working 21 or more hours a week participated in more ECA than their peers working 11-20 hours a week. Results are discussed in terms of Barker's staffing theory, and implications for future research and educational policy are identified. (Contains 1 figure and 2 tables.)