This paper provides an introduction to Posttraumatic Stress Disorder (PTSD) in a manner that facilitates the interested learner's further exploration. It presents theoretical references and reviews the social factors and epidemiology of PTSD in children and adolescents. The psychobiology of PTSD is described in relation to the types of memory it affects. Symptomatic presentations are outlined by developmental periods in children and adolescents. Treatment for PTSD can be described in four stages: (1) safety; (2) remembrance; (3) mourning; and (4) reconnection. Safety encompasses the healing relationship; naming the problem; restoring control; and medication use. Remembrance involves reconstructing the story; re-experiencing it; and integrating the trauma. Mourning includes the emotions of revenge; forgiveness; compensation; and grief. Reconnection involves taking power; creating boundaries; and reconnecting with self. Formation and implementation of a school reintegration safety plan requires informed and committed school personnel, parents, and students. A school integration safety plan is presented as an effective external support system to help student resiliency. (Contains 81 references and a listing of recommended readings.) (JDM)