In this webinar on the 12th Edition of the AAIDD Manual (Schalock, Luckasson, & Tassé, 2021), AAIDD will present and discuss the recently published "Intellectual Disability: Definition, Diagnosis, Classification, and Systems of Supports."  The goal for this webinar is to briefly review the changes that have been integrated into the 12th Edition.  AAIDD will provide a brief overview of the content and discuss how the 12th Edition of the AAIDD Manual aligns with the DSM-5 and ICD-11. There will be an opportunity for a Q&A.