This text approaches critical thinking as a process by which one takes charge of, and responsibility for, one's thinking. It provides both a holistic theme that runs through-out and practical analytic and evaluative tools that can be used to target and improve specific dimensions of thinking. It is designed to foster the development of critical thinking skills and abilities as well as intellectual dispositions such as fair-mindedness, intellectual humility, and intellectual integrity. Based on 20 years of teaching and research with the Center For Critical Thinking, the approach is an eminently practical one. It is filled with Think-For-Yourself activities and examples from everyday life. It shows the reader how to use critical thinking to achieve deep and significant learning in all disciplines and subjects.