| Acknowledgements | 第10-11页 |
| Abstract in English | 第11-12页 |
| 中文摘要 | 第13-14页 |
| Chapter 1 Introduction | 第14-17页 |
| 1.1 Research Background | 第14-15页 |
| 1.2 The Purpose and Significance of the Study | 第15页 |
| 1.3 The Layout of the Thesis | 第15-17页 |
| Chapter 2 Literature Review | 第17-30页 |
| 2.1 Definition of Stratified Teaching | 第17页 |
| 2.2 Previous Studies on Stratified Teaching at Home and Abroad | 第17-23页 |
| 2.2.1 Previous Studies on Stratified Teaching Abroad | 第17-19页 |
| 2.2.2 Previous Studies on Stratified Teaching at Home | 第19-23页 |
| 2.3 Theoretical Framework | 第23-30页 |
| 2.3.1 Zone of Proximal Development Theory | 第23-24页 |
| 2.3.2 Mastery Learning Theory | 第24-25页 |
| 2.3.3 Optimization of Teaching Process Theory | 第25-26页 |
| 2.3.4 Action Research | 第26-30页 |
| 2.3.4.1 The Definition of Action Research | 第27页 |
| 2.3.4.2 The Characteristics of Action Research | 第27-28页 |
| 2.3.4.3 The Procedure of Action Research | 第28-30页 |
| Chapter 3 Research Methodology | 第30-35页 |
| 3.1 Research Questions | 第30页 |
| 3.2 Research Subjects | 第30-31页 |
| 3.3 Research Instruments | 第31-32页 |
| 3.4 Procedure | 第32-35页 |
| Chapter 4 The First-round Action Research | 第35-52页 |
| 4.1 Discovering Problems | 第35-36页 |
| 4.2 Designing the Action Plan | 第36-37页 |
| 4.3 Implementing the Action Plan | 第37-41页 |
| 4.4 Reflection and Evaluation | 第41-50页 |
| 4.4.1 The Result of Students’ English Learning Status (Questionnaire One) | 第41-46页 |
| 4.4.2 The Comparison of Test Results Before and After the First-round ActionResearch (Tests 1 & 2) | 第46-48页 |
| 4.4.3 Students’ Feedback in the First-round of Action Research | 第48-50页 |
| 4.5 Summary of the First-round Action Research | 第50-52页 |
| 4.5.1 Major Achievements | 第50-51页 |
| 4.5.2 Major Problems | 第51-52页 |
| Chapter 5 The Second-round Action Research | 第52-65页 |
| 5.1 Identifying Problems | 第52页 |
| 5.2 Adjusting the Action Plan | 第52-53页 |
| 5.3 Implementing the New Action Plan | 第53-54页 |
| 5.4 Reflection and Evaluation | 第54-61页 |
| 5.4.1 Students’ Views on the Stratified Teaching (Questionnaire Two) | 第54-59页 |
| 5.4.2 The Comparison of Test Results of the Two Rounds of Action Research(Tests 1, 2, 3) | 第59-61页 |
| 5.5 Summary of the Second-round Action Research | 第61-62页 |
| 5.5.1 Major Achievements | 第61页 |
| 5.5.2 Major Problems | 第61-62页 |
| 5.6 Discussion | 第62-65页 |
| 5.6.1 Discussion on the effects of applying stratified teaching model in Englishteaching of middle school | 第62页 |
| 5.6.2 Discussion on how to use stratified teaching model to solve the problem oflarge individual differences among students in English class of junior high school | 第62-65页 |
| Chapter 6 Conclusion | 第65-69页 |
| 6.1 Major Findings | 第65-66页 |
| 6.2 Practical Implications | 第66-67页 |
| 6.3 Limitations of the Study | 第67-68页 |
| 6.4 Suggestions for Further Research | 第68-69页 |
| Reference | 第69-72页 |
| Appendix Ⅰ Questionnaire Compiling Table 1 (before the first-round actionresearch) | 第72-73页 |
| Appendix Ⅱ Questionnaire 1 (before the first-round action research) | 第73-75页 |
| Appendix Ⅲ Questionnaire Compiling Table 2 (after the second-round actionresearch) | 第75-76页 |
| Appendix Ⅳ Questionnaire 2 (after the second-round action research) | 第76-78页 |
| Appendix Ⅴ Teaching Plan in the First-round Action Research | 第78-80页 |
| Appendix Ⅵ Teaching Plan in the Second-round Action Research | 第80-82页 |
| Appendix Ⅶ Scores of Three Tests of the 48 Students | 第82-83页 |
| Appendix Ⅷ The Outline of Interview | 第83-84页 |
| Appendix Ⅸ Interview Records (after the first-round action research) | 第84-86页 |
