At Chester, simulated patients called Associate Clinical Educators (ACEs) are used for teaching and assessing students. ACEs role play patients for students to practice clinical skills like physical exams. They are used for scenarios in areas like emergency medicine. Students find the experience with ACEs extremely valuable for developing skills and preparing for assessments. Potential threats to the continued use of ACEs include financial constraints, measuring student outcomes, expanding training for ACEs, and ensuring they do not replace clinician resources. Future research could explore how ACEs and simulated patients impact student performance compared to traditional teaching methods.