1 Introduction to the Scottish Qualifications Authority 2 Introduction to the Unit 2.1 What is the Purpose of this Unit? 2.2 What are the Outcomes of the Unit? 2.3 What do I Need to be Able to do in Order to Achieve the Unit? 2.4 Aproximate Study Time for This Unit 2.5 Equipment/Material Required for this Unit 2.6 Symbols Used in this Unit 3 Assessment Information for this Unit 3.1 What Do I Have to Do to Achieve This Unit? 4 Suggested Lesson Plan 5 Learning Material 5.1 Section 1 5.2 Section 2 5.3 Section 3 6 Additional Reading Material 7 Solutions to Self Assessde Questions and Activities 8 Acknowledgements