This document discusses thinking and related cognitive processes. It defines thinking as a complex mental process that involves manipulating symbols, images, and concepts to solve problems. There are different types of thinking, including autistic thinking which involves personal ideas, and realistic thinking which can be convergent to find a single solution, divergent to generate multiple ideas, or evaluative to assess situations. Problem solving is described as overcoming obstacles to achieve a goal, and involves defining the problem, understanding perspectives, and using creative strategies. Critical thinking is reflective thinking focused on deciding what to believe, and involves skills like valid reasoning, recognizing bias, and questioning assumptions. The document outlines how to foster these skills in students through concept mastery, clear instruction,