The TEXAS Medical Guide Clerkship Program Teacher's Manual is written to help geriatric preceptors enable medical students to practice effectively in a clinical setting. Medical students often have difficulty synthesizing multiple components of their education to formulate a patient's comprehensive medical plan of care. Specifically, this manual will help to fill training gaps in caring for older adult patients, many of whom have complex medical problems influenced by social situations that must be addressed differently than younger patients. The manual is based on the Association of American Medical Colleges (AAMC) geriatric competencies, clinician experience and evidence-based research.