Supporting individuals with Intellectual and Developmental Disabilities (IDD)and co-occurring mental illness (MI)can be difficult. This course will cover pro-active steps to avoid aggression and agitation as well as de-escalation methods. Good team communication can also help support those people with MI and IDD. The Integrated Dual Disorder Treatment (IDDT) model has also been adapted for treatment of people with IDD as well. Practical tips in working with people with Borderline Personality Disorder, Mood Disorders, Anxiety Disorders, and Trauma co-occurring with IDD will be discussed.