In Stephen Bowkett's book, 100 Ideas For Teaching Thinking Skills, readers will encounter thought at several levels. The introductory pages describe notions such as metacognition, the systematic development of ideas, the nature of consciousness and verification. The later sections explain how these can be developed in the classroom. Games such as What If? (constructing alternative universes) or variants on Odd One Out (including Odd Two Out and Odd One In) are serious fun. Creating hypotheses to explain simple scenarios and using metaphors for precise definitions takes us into strange but intriguing regions of the mind. 100 Ideas For Teaching Thinking Skills costs pound;8.99 from Continuum.