This document discusses critical thinking, including what it is, why it is important, and how it improves teaching and learning. It defines critical thinking as a self-directed process of analyzing and assessing thinking to improve its quality. Critical thinking is contrasted with instinctive "green thinking" and described as disciplined, self-assessing, and aimed at eliminating biases. The document provides examples of how to engage in critical thinking, such as through questioning assumptions, avoiding logical fallacies, and considering multiple perspectives. Key skills discussed include becoming an active learner, keeping an open mind, and separating emotions from facts.