作者採行動研究法，發揮知、行、思的精神，結合暑假作業與專題式學習，嘗試解決教學時間不足的困境；並持續檢視研究資料，改變教學設計，以引導班上21名學生，配合鄉土課程內容，完成社區專題式學習。暑假前即開始選題、分組、設計、討論與安排訪問的各項事宜，以便學生在家長陪同下，進行為期二個月的社區踏查；開學後，即指導學生整理與分析社區踏查所獲得的資料，同時根據進一步理解的需要而再訪問，最後將學習結果與建議，寫信轉達市公所，並以網頁與社區人士分享。研究發現：1.延伸利用暑假時間，及多元分析方式，有助於專題式學習的資料蒐集、檢視、討論與修正，使學生獲得社區生活情境認知的體驗學習；2.學生經由合作學習而截長補短、分享互動，並進行批判思考而解決社區生活的環境問題。本研究除可提供教師有關指導學生從事社區專題式學習方面的行動革新經驗，專題小組也在整個學習過程，擁有資訊應用、情境認知、及合作學習等豐富的成長體驗，因此具有實際的教育意義與價值。

This study is about one class 21 students' community project-based learning. The researcher attempt to resolve teaching traps by using AR within community project-based learning's conducting processes, which is to know, to act, to reflect, and toward consequence an adaptive teaching research design. The community dusk-market is students' project's theme; originate in the local curriculum's content. The preparations have been done before summer vacation for resolving time-lack trap; students were to divide into groups, to write down the interview questions, et al.; and some parents accompany them to explore the stall vendors' working reality. Arrange and analyze the research data departure from new semester starting. Students also learn to interview again for get complementary data. At last, they use the data to post at the community's bulletin, and to write e-mail to the city-house and try to response the community people's demands. Results are as two: (1) Extend implement period to summer vacation, as well as multiple data analysis, both could improve students situation cognition and experience within collecting, checking, discussing and renewing of community project-based learning processes; (2) By way of interacting and cooperating from the community dusk-market project learning, students criticizing, reflecting, applying, and trying to resolve the environment problems. The evolution of teaching experiences, and the promotion of computer competence, situation cognition, collaboration learning, et al., which derive from community project-based learning processes, both were significant and valuable. At the end, two suggestions are provided.