Serious health concerns have been identified within Hispanic populations, particularly those who are sedentary and overweight/obese. Hispanics living in Puerto Rico are among the least physically active populations in the United States or its outlying territories. Empirical evidence indicates that instructional practices, programs, and policies in schools contribute to adolescents' physical activity behaviors. The purpose of this project is to analyze middle schools' instructional practices and policies, and to analyze environmental variables that either accommodate or limit Hispanic adolescent's physical activity choices and behaviors while traveling to and from schools, and while at these schools.  Data will be gathered using a demographic questionnaire, content analysis procedures, interview guides, and a survey instrument.