Simulation can represent many situations in the real medical world: physician-patient dialog, physical examination, surgical procedures; as well as resources for basic medical teaching: cadavers, physiology labs. These simulated situations and resources support the development of a new mode of teaching and learning that encourages individual exploration and collaborative learning. At the same time, simulations provide the promise of a comprehensive standardized exposure to a set of clinical cases and labs that augment the opportunistic clinical experiences current in today's hospital wards. In this talk, I will present a sampling of simulators, discuss the underlying technology, indicate their integration into the curriculum, and present assessment where available.