《21世纪大学英语》（S版）系列教材（第2版）根据教育部最新研制的“中国英语能力等级量表”和《大学英语教学指南》（教育部最新版）以及我国高等院校人才培养特点和教学改革的最新成果编写而成，突出教学内容的实用性和针对性，将语言基础能力的培养与实际涉外交际能力的训练有机地结合起来，以满足21世纪全球化社会经济发展对大学生的要求。
本系列核心教材包括《综合教程》、《综合练习》、《教学参考书》（每一种分为1－4册）及配套的MP3、多媒体课件、电子教案、网络课程等。本套教材供高等院校普通英语教学使用。
本书为《教学参考书》第3册，共8个单元，每个单元根据《综合教程》的相关内容配备教法推荐、作者介绍、背景知识、课文详解以及练习答案和录音文本等。同时，本书在版式设计上有所改革，将学生用书的内容完整地融入教学参考书，课文讲解引入了“左学右教”的方式，以方便教师教学。本书另配有电子教案。
《21世纪大学英语教学参考书（附光盘S版3第2版）》由翟象俊、刘春波、关景军主编。

Unit I Career Competencies
I. Objectives
II. Suggested Teaching Plan for Unit
III. Background Information
IV. Class Presentation
Part I Listening
Part II Reading
Text A: Memo from Your Future Boss
Text B: 7 Computer Skills You'll Need for Success
Text C: 5 Tips for Career Success
Part III Speaking
Part IV Translation & Writing (Sales Letters)
Part V Time to Relax
Unit 2 Sustainable Living
I. Objectives
II. Suggested Teaching Plan for Unit
III. Background Information
IV. Class Presentation
Part I Listening
Part II Reading
Text A: Making Do Without the Minivan
Text B: A Day in a Greener Life
Text C: The Earth Is Counting on You!
Part III Speaking
Part IV Translation & Writing (Offer Letters)
Part V Time to Relax
Unit 3 Road to Success io
I. Objectives
IL Suggested Teaching Plan for Unit
III. Background Information
IV. Class Presentation
Part I Listening
Part II Reading
Text A: Play to Your Strengths
Text B: The Language of Success
Text C: Are You a Loser?
Part III Speaking
Part IV Translation & Writing (Order Letters)
Part V Time to Relax
Unit 4 Space Technology
I. Objectives
II. Suggested Teaching Plan for Unit
III. Background Information
IV. Class Presentation
Part I Listening
Part II Reading
Text A: Eye in the Sky
Text B: Space Junk
Text C: Space Quest
Part III Speaking Part IV Translation & Writing (Confirmation Letters)
Part V Time to Relax
Unit 5 Travel
I. Objectives
II. Suggested Teaching Plan for Unit
III. Background Information
IV. Class Presentation
Part I Listening
Part II Reading
Text A:Around the World at
Text B: Travel School
Text C: The Reason I Travel
Part III Speaking
Part IV Translation & Writing (Verification Letters)
Part V Time to Relax
Unit 6 Teaching
I. Objectives
II. Suggested Teaching Plan for Unit
III. Background Information
IV. Class Presentation
Part I Listening
PartII Reading
Text A: What Makes a Master Teacher?
Text B: Getting Behind the Teacher's Desk
Text C: Searching for an Unruly Student
Part III Speaking
Part IV Translation & Writing (Resignation Letters)
Part V Time to Relax
Unit 7 Construction
I. Objectives
II. Suggested Teaching Plan for Unit
III. Background Information
IV. Class Presentation
Part I Listening
Part II Reading
Text A: A Mile High in the Sky
Text B: World's Coolest Skyscraper
Text C: Building the Transcontinental Railroad
Part III Speaking
Part IV Translation & Writing (Adjustment Letters)
Part V Time to Relax
Unit 8 Code of Conduct
I. Objectives
II. Suggested Teaching Plan for Unit 8
III. Background Information
IV. Class Presentation
Part I Listening
Part II Reading
Text A: Real World ABCs: Your Code of Conduct for Life (A-L)
Text B: Real World ABCs: Your Code of Conduct for Life (M-Z) Text C: Six Stupid Things I've Done
Part III Speaking
Part IV Translation & Writing (Price Increase Letters)
Part V Time to Relax
Grammar Review
I. Direct Speech and Indirect Speech
II. Attributive Clauses (1)
III. Attributive Clauses (2)
IV. Noun Clauses
V. Appositive Clauses
VI. Adverbial Clauses of Time, Space and Manners
VII. Adverbial Clauses of Condition, Concession and Cause
VIII. Adverbial Clauses of Result, Purpose and Comparison