To the Instructor Acknowedgments Unit 1 Explorers Lesson 1 Vurke and Wills: Across Australia Lesson 2 Alexandra David-Neel: A French Woman in Tibet Lesson 3 Vitus Bering: A cross Siberia to North America Lesson 4 Robert Scott: A Race to the South Pole Lesson 5 Into the Deep: Ocean Exploration Extension Activities Video Highlights: CNN Video, Deep Sea Exploration Activity Page: Adventure Trail Dictionary Page: Understanding Definitions Unit 2 World Issues Lesson 1 World Population Growth Lesson 2 Changes in the Family Lesson 3 Women and Change Lesson 4 Rain Forests Lesson 5 The Garbage Project Ectension Activities Video Highlights: CNN Video, Lalita's Story Activity Page: Crossword Puzzle Dictionary Page: Working with Word Forms Unit 3 A Mishmash, or Hodgepodge Lesson 1 Roadrunners Lesson 2 Afraid to Fly Lesson 3 Languages and Language Diversity Lesson 4 Skyscrapers Lesson 5 Left-Handedness Extension Activities Video Highlights: CNN Video, The Creen Skyscraper Activity Page: Familiar Phrases Dictionary Page: Understanding Grammar Codes Unit 4 Science Lesson 1 Biospherse in Space Lesson 2 Earthquakes Lesson 3 Snow and Hail Lesson 4 Photovoltaic Cells: Energy Source of the Future Lesson 5 Biological Clocks Extension Activites Video Highlights: CNN Video, Ozone Depletion Activity Page: Chemical Crossword Puzzle Dictionary Page: Doing Dictionary Research Unit 5 Medicine and Health Lesson 1 Headaches Lesson 2 Sleep and Dreams Lesson 3 Health Care and Epidemics Lesson 4 Medicine: From Leeches to Lasers Lesson 5 Cholesterol and Heart Disease Extension Activities Video Highlights: CNN Video, The Singing Doctor Activity Page: Who Said What? Dictionary Page: Learning Acout Word Stress Vocabulaty Skills Index