High school physical education classes provide students with numerous opportunities for social interactions, but few studies have explored how social strivings impact class engagement. The purpose of this study was to investigate the relationships among 2 x 2 achievement goals, social motivation orientations, and effort in high school physical education classes using contemporary goal theory. A total of 105 ninth and tenth grade students reported their social motivation orientations, achievement goal orientations, and effort toward physical education. All four 2 x 2 achievement goals and three social motivation orientations had positive relationships with students' self-reported effort in physical education. Further regression analysis revealed that mastery approach, performance avoidance, and social status goal orientations accounted for unique variance in explaining self-reported effort in high school physical education. Thus, students' social strivings produce constructive outcomes in high school physical education and teachers who are able to promote healthy social climates can reap these benefits. (Contains 2 tables.)