| Acknowledgements | 第4-5页 |
| Abstract | 第5-6页 |
| 摘要 | 第7-11页 |
| Chapter One Introduction | 第11-17页 |
| 1.1 General description of the study | 第11-13页 |
| 1.2 Motivations of the study | 第13-14页 |
| 1.3 Significance of the study | 第14-15页 |
| 1.4 Structure of the thesis | 第15-17页 |
| Chapter Two Literature Review | 第17-27页 |
| 2.1 Discussions of the key terms in this study | 第17-19页 |
| 2.1.1 Definitions of the heterogeneous class in this study | 第17-18页 |
| 2.1.2 Classifications of the heterogeneous class in this study | 第18-19页 |
| 2.1.3 Characteristics of the heterogeneous class in this study | 第19页 |
| 2.2 Theoretical bases in this study | 第19-23页 |
| 2.2.1 Krashen's Input Hypothesis | 第20-21页 |
| 2.2.2 Scaffolding Theory | 第21-22页 |
| 2.2.3 Schema Theory | 第22-23页 |
| 2.3 Previous studies on heterogeneous classes abroad and in China | 第23-27页 |
| 2.3.1 Previous studies on heterogeneous classes abroad | 第24-25页 |
| 2.3.2 Previous studies on heterogeneous classes in China | 第25-27页 |
| Chapter Three Description of Heterogeneous Classes | 第27-37页 |
| 3.1 Description of teaching material | 第27-28页 |
| 3.2 Descriptions of the three classes | 第28-37页 |
| 3.2.1 Description of Case 1 | 第28-31页 |
| 3.2.2 Description of Case 2 | 第31-33页 |
| 3.2.3 Description of Case 3 | 第33-37页 |
| Chapter Four Analysis of Heterogeneous Classes | 第37-51页 |
| 4.1 Analysis of teachers and students | 第37-38页 |
| 4.2 Analysis of teaching material | 第38页 |
| 4.3 Analysis of teaching objectives | 第38-39页 |
| 4.4 Analysis of teaching methods and designs | 第39-51页 |
| 4.4.1 Analysis of Case 1 | 第40-43页 |
| 4.4.2 Analysis of Case 2 | 第43-46页 |
| 4.4.3 Analysis of Case 3 | 第46-49页 |
| 4.4.4 A summary of the analyses of the three cases | 第49-51页 |
| Chapter Five Conclusion | 第51-54页 |
| 5.1 Major findings | 第51-52页 |
| 5.2 Pedagogical implications | 第52-53页 |
| 5.3 Limitations and suggestions for future | 第53-54页 |
| References | 第54-58页 |
| Appendix Ⅰ: The teaching material | 第58-60页 |
| Appendix Ⅱ: Transcription of three cases | 第60-76页 |
