Role assignment in simulation involves assigning students specific roles to simulate healthcare providers and the patient environment. Roles can include the primary nurse, medication nurse, and roles of other disciplines. Research shows roles promote active learning of skills and knowledge. Roles are commonly assigned by the facilitator and may be tailored to learners or randomly assigned. Students should be prepared for their roles and observers have an important role to focus on through structured observation sheets. Debriefing incorporates learning from all roles.