This study is concerned with the problem of determining whether there is a relationship between achievement and specific ethnic and profile characteristics of Anglo-American and Mexican-American junior and senior high school students who are enrolled in a large metropolitan public school district. The purposes include (a) delineation of demographic data on these students in terms of specific group membership, gender, age, and educational concerns; (b) identification of the attitudes and values of these students; (c) evaluation of the relationships between the demographic data and the degree to which ethnic membership and interpersonal concerns impact participation in the classroom.