Estimates suggest that nearly 475,000 children and youth attending schools in the US are diagnosed with emotional and behaviour disorders (EBDs) such as childhood depression, dysthymia, conduct disorders, oppositional defiant disorder, attention deficit/hyperactivity disorder, selective mutism, and autism. Estimates of prevalence in Canada are assumed to be equally as high, ranging from >1% to 12%, although a lack of consensus and stability in the definition of EBD across the country makes it very difficult to provide valid estimates. These deficits affect performance in fundamental areas of functioning including behaviour, social interactions, social skill fluency, and academic achievement. Remediation in social skills training (SST) is required to help students with EBD develop in their areas of weakness.