Exposure to traumatic events among youth is relatively common. Almost all youth experience initial distress as a reaction to such events, but for most, natural resilience causes the distress to gradually subside. However, a substantial minority continue to experience distress in the months after trauma exposure. The Cognitive Behavioral Intervention for Trauma in Schools (CBITS) program is designed for use with groups of students who have experienced significant traumatic experiences and are suffering from related emotional or behavioral problems, particularly symptoms of post-traumatic stress disorder. Delivered by school-based clinicians and taking into account cultural context, it uses a variety of proven cognitive behavioral techniques in an early intervention approach, including psychoeducation about trauma and its consequences, relaxation training, learning to monitor stress or anxiety levels, recognizing maladaptive thinking, challenging unhelpful thoughts, social problem-solving, creating a trauma narrative and processing the traumatic event, and facing trauma-related anxieties rather than avoiding them. CBITS focuses primarily on three goals: decreasing current symptoms related to trauma exposure, building skills for handling stress and anxiety, and building peer and caregiver support. The second edition provides updates and implementation guidance based on two decades of using CBITS nationally.