A psychological disorder is a persistent pattern of thought emotion and behavior that causes suffering and is regarded as ‘abnormal’ in the individual's culture or society. We begin this child psychology course by describing the impact of childhood behavioral and psychological disorders. We then explain why it is important to identify the causes of attention-deficit/hyperactivity disorder (ADHD). We provide you with answers to questions such as ‘what are the symptoms of oppositional defiant disorder?’ and ‘what are some treatments for tic disorders?’.This child psychology course explores the long-term consequences of separation anxiety disorder. We show you how to identify selective mutism and specific phobias. Mental disorders are not the only types of mental health challenges so this course also provides some information regarding social anxiety disorder in children. We provide answers to questions like ‘what are the causes of pervasive generalized anxiety?’ and ‘how can you identify an obsessive-compulsive disorder?'.We outline the fundamental concepts you need to understand to appreciate how children affected by behavioral and psychological disorders can have difficulty developing as they grow. We explain how to start and build a career in identifying and studying children with behavioral and psychological disorders. Sign up for this child psychology course that helps parents teachers childcare providers and anyone who works with children to understand the impact of behavioral and psychological disorders on early childhood development and education.