Noting that young adolescents are very much affected by their families, this booklet, in both English- and Spanish-language versions, was prepared for parents/guardians of children ages 10-15 to help them provide the support needed by a child undergoing some of the most dramatic changes in a lifetime. The booklet describes typical behavior of preadolescents and offers advice to parents on responding appropriately. Topics covered in this booklet include: (1) getting ready for changes; (2) forgetting; (3) irritability; (4) power plays; (5) friendships; (6) chores; (7) worries; and (8) joys. (EV)