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Unit 1 Explorers
Lesson 1 Burke and Wills: Across Australia
Lesson 2 Alexandra David-Neel: A French Woman in Tibet
Lesson 3 Vitus Bering: Across 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 88
Lesson 5 The Garbage Project
Extension Activities
Video Highlights: CNN Video, Lalitas 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 Green Skyscraper
Activity Page: Familiar Phrases 165
Dictionary Page: Understanding Grammar Codes
Lesson 1 Biospheres in Space
Lesson 2 Earthquakes
Lesson 3 Snow and Hail
Lesson 4 Photovoltaic Cells：Energy Source of the Future
Lesson 5 Biological Clocks
Extension Activities
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 Le‘eches to Lasers
Lesson 5 Cholesterol and Heart Disease
Extension Activities
Video Highlights：CNN Video，The Singing Doctor
Activity Page：Who Said Wmat?
Dictionary Page：Learning About Word Stress
Unit Quiz
Vocabulary
Skills Index
Video Transcripts
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