Teacher and peer perceptions of aggression were investigated in a samp
le of 899 students. Teachers rated their students in Grades 3 through
8 on an 8-item scale assessing peer-directed aggression. Students comp
leted a questionnaire within classrooms that measured acceptance, reje
ction, and peer-directed aggression. Both teachers and peers reported
higher levels of aggression in boys than in girls. Teacher and peer pe
rceptions of aggressive behavior were more congruent for boys than for
girls, but this congruence differed significantly as a function of et
hnicity. Significant differences among individual classrooms also exis
ted in both teacher and peer ratings, as well as in the relationships
between the 2 measures. Findings of gender, grade level, ethnic, and c
lassroom differences are compared with previous research, and issues r
elevant to the identification of highly aggressive youth are discussed
.