| Acknowledgements | 第4-5页 |
| Abstract | 第5-6页 |
| 摘要 | 第7-11页 |
| Chapter One Introduction | 第11-16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页 |
| 1.4 Structure of the thesis | 第14-16页 |
| Chapter Two Literature Review | 第16-29页 |
| 2.1 Key terms in this study | 第16-21页 |
| 2.1.1 Heterogeneous class | 第16-18页 |
| 2.1.2 Deductive method | 第18-19页 |
| 2.1.3 Inductive method | 第19-20页 |
| 2.1.4 Task-based approach | 第20-21页 |
| 2.2 Theoretical bases in this study | 第21-25页 |
| 2.2.1 Scaffolding Theory | 第21-23页 |
| 2.2.2 Cognitive Learning Theory | 第23-25页 |
| 2.3 Previous studies on heterogeneous classes abroad and in China | 第25-29页 |
| 2.3.1 Previous studies on heterogeneous classes abroad | 第25-26页 |
| 2.3.2 Previous studies on heterogeneous classes in China | 第26-29页 |
| Chapter Three Description of Heterogeneous Classes | 第29-42页 |
| 3.1 Description of teaching material | 第29页 |
| 3.2 Descriptions of three classes | 第29-42页 |
| 3.2.1 Description of Case 1 | 第30-33页 |
| 3.2.2 Description of Case 2 | 第33-36页 |
| 3.2.3 Description of Case 3 | 第36-42页 |
| Chapter Four Analysis of Three Heterogeneous Classes | 第42-59页 |
| 4.1 Analysis of teachers and students | 第42-43页 |
| 4.2 Analysis of teaching material | 第43-44页 |
| 4.3 Analysis of teaching objectives | 第44-45页 |
| 4.4 Analysis of teaching methods and designs | 第45-59页 |
| 4.4.1 Analysis of Case 1 | 第46-49页 |
| 4.4.2 Analysis of Case 2 | 第49-52页 |
| 4.4.3 Analysis of Case 3 | 第52-55页 |
| 4.4.4 Summary of and reflection on the analyses of three cases | 第55-59页 |
| Chapter Five Conclusion | 第59-62页 |
| 5.1 Major findings | 第59-60页 |
| 5.2 Pedagogical implications | 第60-61页 |
| 5.3 Limitations and suggestions for future | 第61-62页 |
| References | 第62-67页 |
| Appendix Ⅰ: The Teaching Material | 第67-69页 |
| Appendix Ⅱ: Transcriptions of the Three Cases | 第69-88页 |
