In Finnish secondary schools, girls and boys are taught physical education (PE) in separate groups. A male teacher normally teaches the boys and a female teacher teaches the girls. Focusing on PE teachers' comments in two different ethnographic studies of seventh graders (13-14-year-olds), we examine the processes that reproduce or challenge the gender system and the possibilities of agency in the context of PE. Our findings suggest that the bodies of male students are regarded as strong and are, therefore, appreciated by both female and male teachers. Moreover, male teachers' competence in PE is evaluated higher than that of the female teachers. None of the teachers questioned the male teachers' ability to teach girls, however, heteronormativity arose as an issue. There were more doubts over female teachers' competence to teach boys. (Contains 15 notes.)