Part I The Value of Observation, Christina Tilstone; Chapter 2 The Techniques of Observation, Christina Tilstone; Chapter 3 Recording Evidence, Christina Tilstone; Chapter 4 Partnership Observation, Christina Tilstone; Part II The Use of Unstructured Observation in Teacher Assessment, Catherine Clark, Sally Leat; Chapter 6 From Observation to Inference about Challenging Behaviours, John Harris; Chapter 7 The Role of Observation in Teacher Appraisal, John Moore; Chapter 8 Conclusion, Christina Tilstone;