| Acknowledgements | 第1-7页 |
| 论文摘要 | 第7-8页 |
| Abstract | 第8-13页 |
| Chapter One Introduction | 第13-17页 |
| ·The status quo of coursebook development and evaluation | 第13-14页 |
| ·The significance and purpose of the research | 第14-15页 |
| ·The structure of the study | 第15-17页 |
| Chapter Two Literature Review | 第17-30页 |
| ·Coursebook Evaluation | 第17-19页 |
| ·The definition of coursebook | 第17-18页 |
| ·A review on coursebook evaluation | 第18-19页 |
| ·Studies on coursebook difficulty and task difficulty | 第19-27页 |
| ·Studies on coursebook difficulty levels | 第19-21页 |
| ·Studies on task difficulty criteria | 第21-27页 |
| ·Peter Skehan's three-way distinction for the analysis of tasks | 第24-25页 |
| ·Robinson's triadic framework for investigating tasks | 第25-27页 |
| ·Description of CDLEF (Coursebook Difficulty Levels Evaluation Framework) | 第27-30页 |
| Chapter Three The Design of the Research | 第30-37页 |
| ·The research objectives | 第30页 |
| ·Subjects | 第30-31页 |
| ·The research instruments | 第31-34页 |
| ·The research procedure | 第34-35页 |
| ·Data analysis methods | 第35-37页 |
| Chapter Four Results Report | 第37-51页 |
| ·Results report of the seven instruments | 第37-50页 |
| ·I1:Instant Evaluation by students | 第37-38页 |
| ·I2:Evaluation Questionnaire for students | 第38-42页 |
| ·I3:Interview with students | 第42-43页 |
| ·I4:Test | 第43-46页 |
| ·I5:Instant Evaluation by teachers | 第46-47页 |
| ·I6:Evaluation Questionnaire for teachers | 第47-48页 |
| ·I7:Interview with teachers | 第48-50页 |
| ·A summary | 第50-51页 |
| Chapter Five Discussion and Findings | 第51-71页 |
| ·Analysis of the eight descriptors in CDLEF | 第51-66页 |
| ·Amount of reading | 第51页 |
| ·Amount of new words | 第51-52页 |
| ·Density of grammar points | 第52-53页 |
| ·Density of writing tasks | 第53页 |
| ·Degree of structuralized combination of knowledge, skills and context | 第53-56页 |
| ·Presentation of abstract knowledge and skills | 第56-60页 |
| ·Induction | 第60-65页 |
| ·Inquiry | 第65-66页 |
| ·Analysis of the newly-found descriptors | 第66-71页 |
| ·Output load | 第66-68页 |
| ·Continuity | 第68-71页 |
| Chapter Six Conclusion | 第71-77页 |
| ·The two-dimensional framework for evaluating coursebook difficulty levels | 第71-74页 |
| ·Guidelines for coursebook development and evaluation | 第74-75页 |
| ·Limitations and suggestions | 第75-77页 |
| Bibliography | 第77-81页 |
| Appendix | 第81-101页 |
| Appendix 1 Instant Evaluation by students | 第81-82页 |
| Appendix 2 Evaluation Questionnaire for students | 第82-86页 |
| Appendix 3 Interview with students | 第86-87页 |
| Appendix 4 Test | 第87-96页 |
| Appendix 5 Instant Evaluation by teachers | 第96-97页 |
| Appendix 6 Evaluation Questionnaire for teachers | 第97-101页 |
| Appendix 7 Interview with teachers | 第101页 |
