Snellman, Kaisa, Jennifer M. Silva, and Robert D. Putnam. "Inequity Outside the Classroom: Growing Class Differences in Participation in Extracurricular Activities." Voices in Urban Education 40 (2015): 7-14.

Abstract

Research shows that extracurricular activities help cultivate the skills, connections, and knowledge that prepare children for lifelong success, but low-income students are increasingly excluded from participating.