本研究為質性教學研究，研究步驟分為兩階段：第一階段對於台灣高三學生在學習英文寫作時所經歷的困難與需求進行初步調查；第二階段使用初步調查的結果來設計並實施提升自主學習能力的差異化英文寫作課程，並探討此教學對於學生的自主學習能力及英文寫作能力的影響。
在第一階段的初步調查中，作者於2013年5月請375位就讀於台灣北部某高中的高三學生填寫一份關於學習英文寫作困難與需求的問卷，並於6月對這些學生的10位英語教師進行訪談，以期獲得不同的觀點、瞭解教與學的差異、並從中學習他們的教學經驗。初步調查結果表示，多數學生有四種英文寫作上的困難。訪談結果表明，部分教師（但並非全部）已注意到這些問題，也曾使用不同教學策略試圖解決這些困難，學生反應基本上良好，但是仍有少部分學生認為效果不彰並提出建議。
在第二階段的後續研究中，作者於2013年8月至2014年1月於同一所高中教授一個高三班級，根據初步調查結果設計五項差異化英文寫作教學活動，以期解決此四種學習困難，並同時促進自主學習、提高學習動機、提升寫作表現。此後續研究使用的工具包括學生的學習日誌、研究者的教學日誌及課堂觀察。研究結果指出，此教學研究有效促進學生的自主學習能力、學習動機及寫作表現。最後，本研究針對台灣高中英文寫作教學以及未來相關研究提出建議。

This qualitative pedagogical research was comprised of two stages. The first stage was a preliminary investigation on Taiwanese 12th-graders' difficulties and needs in the learning of English writing; the second stage was a follow-up study where the results of the preliminary investigation were utilized to design a differentiated, autonomy-supportive English writing course. The researcher hoped to promote students' autonomy, motivation, and writing performance through this pedagogical research.
In May 2013, the researcher conducted the preliminary investigation. Firstly, a survey about the difficulties and needs in the learning of English writing was administered to 375 12th-graders who studied in a senior high school based in northern Taiwan. Next, interviews were conducted on these participants' English teachers to gain different perspectives, to discover teaching-learning discrepancies, and to learn from their teaching experiences. The results of this preliminary investigation showed that the students were plagued by four difficulties in the learning of English writing. The interview results showed that some (but not all) of the teachers had noticed and tried to solve these difficulties with various teaching approaches. The results showed that most students considered these approaches effective, but a few had dissenting opinions and raised suggestions.
From August 2013 to January 2014, the researcher conducted the follow-up study in the same target school while she taught one 12th-grade class with 42 students and designed five differentiated, autonomy-supportive English writing interventions based on the findings of the preliminary investigation. The purpose of the interventions was to solve the four writing problems, promote learner autonomy, increase learning motivation, and improve writing performance. The data were qualitative, including the students' learning journal, the researcher's teaching journal, and class observation. The findings showed that the differentiated, autonomy-supportive interventions improved the students' learner autonomy, learning motivation, and English writing performance. Lastly, this pedagogical research offered implications regarding senior high school English writing instructions in Taiwan. Suggestions for future research were also provided.

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