《清华中学英语分级读物》是为广大中学生朋友引进出版的一套知识性很强的阅读教材。它以动物、植物、音乐、探险，发明等百科知识专题为线索，循序渐进地引导读者在愉快的阅读、思考、练习、听朗读、欣赏CNN节目、做游戏的过程中逐步提高阅读能力，迅速扩大词汇量。
《中学生百科英语(3清华中学英语分级读物)》是丛书的第3册，包括五个单元的内容。本书选材丰富生动、课程编排科学完整、版式新颖活泼、配套课件原汁原味，完美匹配我国中学英语现行教学要求，是不可多得的中学英语阅读教材。

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 RainForests
Lesson 5 The Garbage Project
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
Video Highlights：CNN Video，The Green Skyscraper
Activity Page：Familiar Phrases
Dictionary Page：Understanding Grammar Codes
Unit 4 Science
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
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
Video Highlights：CNN Video，The Singing Doctor
Activity Page：Who Said What
Dictionary Page：Learning About Word Stress
Unit Quiz
Vocabulary
Skills Index
Video Transcripts