Researchers have reported a significant relationship between peer rela
tions and school adjustment in same-age classrooms, but little is know
n about the contribution of peer relations to school adjustment in mix
ed-age classrooms. The present study investigated the contributions of
peer acceptance, friendship, social status, and age relative to mixed
-age classmates to children's attitudes toward school and to achieveme
nt in ungraded primary. Children's altitudes toward school were positi
vely related to composite achievement scores. Achievement was predicte
d from demographic variables, children's attitudes, peer acceptance, a
nd friendship status. With the effects of gender and race controlled,
differences in school adjustment were related to both children's socia
l status and whether they had friends.