本文是兩位國小新手自然與生活科技領域教師，以敘說探究為方法，近身觀察一位已退休但仍活躍於自然與生活科技領域教學指導的國小老師，記錄其教學生涯中的重要生命故事與重要他人之資料，以解讀個案對於國小自然科學教育深負使命的背後因素。研究結果顯示，個案對於自然科學教學之使命感，是因受前輩教師的感召，而致力於個人的專業發展和教學經驗傳承。兩位新手教師從個案的生命故事看到自然科教學經驗的傳承精神，並藉由實際參與專業成長團體，沉浸在專業發展的積極氛圍裡。對教師而言，教學成長之路是屬終身學習，在教學生涯之中，若能不斷參與具共同目標的專業成長團體活動，將可形成一股強而有力的教學使命，除了可以支持教師在專業能力上不斷精進，也能讓教師秉持教學的熱忱持續前進。

This article is about two novice elementary science teachers who made a close observation of a retired but still active elementary teacher in the same professional field and found out the spirit that pushed him continuously to dedicate his greatest effort on the elementary science education. Narrative inquiry was used to reveal the most important stories and information of others in his teaching career. Further interviews with people involved and reviews on the written information by the subject were also conducted to verify those facts. The study results showed that the motivation of the subject on science education was inspired by an experienced teacher and therefore he decided to develop his professional field and transfer his experience to the next generation. The two novice teachers not only observed the subject’s teaching experience and spirit in his whole life, they also immersed themselves in a positive atmosphere they never felt before by participating in the professional development group. For teachers, there is no ending for teaching professional growing. They can grow continuously by participating in a professional development group with the same goal, such group can support teachers strongly in pursuing the professional competence and moving forward with the enthusiasm of teaching that never be diminished.