Why critical thinking? -- What is critical thinking? -- Who are the critical thinkers? -- Institute of Medicine competencies as a context for thinking: the how, when, and where of critical thinking -- Critical thinking, quality improvement, and safety -- Critical thinking and patient-centered care -- Critical thinking and interdisciplinary teams -- Critical thinking and evidence-based practice -- Critical thinking and informatics -- Assessing critical thinking -- Thinking realities of yesterday, today, and tomorrow.