Part I: What is thinking? -- Thinking as a skill -- An example of thinking in action -- Errors in thinking -- Perception, logic and thinking -- Patterns -- Patterns and errors -- Approaches to the teaching of thinking -- Part II: Introduction to part two -- Tools for teaching thinking -- Attention-directors -- Preliminary discussion -- Intention -- Timetable -- Teacher training -- Teaching material -- The CoRT thinking lesson -- Teaching points -- Mechanics of the thinking lessons -- Problems -- Tests and testing -- Results -- Conclusion.