Individuals diagnosed with autism spectrum disorder (ASD) display deficits in social communication and engage in repetitive behavioral patterns that affect their peer relationships. Compared to youth without ASD, they are less likely to be accepted and more likely to be rejected by their classmates and are more likely to be victims and perpetrators of bullying. They also face challenges in developing close friendships and romantic relationships. These peer relationship challenges typically result in negative outcomes, including, but not limited to, academic failure, depression, and low self-esteem. Instructors often use norm-based and environmental assessments to identify specific deficits in the social behavior of youth with ASD and to inform interventions that are associated with improved social skills and peer relationships.