Book excerpt: "Anxiety, depression, substance use, conduct disorders, attention-deficit/hyperactivity disorder, and learning disorder are but a subset of problems that youth experience throughout their lives. Chapter 1 presents the school-based practitioner as a first-line interventionist for these difficulties. Framing school-based care within a multi-tiered system of support, Chapter 1 introduces cognitive-behavioral therapy (CBT), an evidence-based intervention with flexible applications for children and adolescents. It acknowledges the complex intersection between CBT, 504 Plans, and individualized education programs (IEPs); discusses the many ways students may receive services under the law (and otherwise); and highlights the details of school-based practice integral to evaluating these plans. Chapter 1 ends with a thorough case presentation complete with background information, interviews, behavior and symptom assessment, CBT session planning, and outcome data"--