Children's friendships provide a logical focus for school mental healt
h programs: they act as early warnings of and preventive interventions
for both scholastic and socioemotional distress. This article examine
s developmental investigations of children's friendships and children
without friends and explains how they challenge current conceptualizat
ions of social interventions and their supporting policies. Developmen
tal changes in children's understanding of friendships and strategies
to identify children without friends are discussed. Factors that co-oc
cur with any may contribute to friendlessness are discussed: behaviors
with peers that disrupt interactions; difficulties with the social co
gnitive tasks of peer interactions; limited empathic abilities; limite
d confidence in social situations, and constrained opportunities to en
ter into social activities. Recommendations for practice and implicati
ons for school policy are given.