ABSTRACT Pre- and in-service teachers’ professional development is critical in the lifelong learning era. This case study explores 27 pre- and in-service teachers’ reasons for selecting a MOOC, their learning experiences, and their perceptions of the value for their professional development. Data sources in this study included: 1) MOOC reviews written and submitted by the participants 2) extended versions of MOOC reviews into research papers, 3) descriptions of MOOCs taken by the participants. Findings of this study indicated that MOOCs served as tremendous resources for multiple learning purposes, evidenced by the voices of these 27 participants. In addition, the multiple pedagogical approaches found in the MOOCs offered great experiential learning spaces for these K-12 pre- and in-service teachers who drew instructional lessons to apply to their current and future professional endeavors.

中文翻译：

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职前和在职教师在MOOC中的专业发展历程

摘要在终身学习时代，职前和在职教师的专业发展至关重要。本案例研究探讨了27位职前和在职教师选择MOOC的原因，学习经验以及对专业发展价值的看法。这项研究的数据来源包括：1）参与者编写和提交的MOOC评论； 2）将MOOC评论扩展到研究论文中； 3）参与者对MOOC的描述。这项研究的结果表明，MOOC是用于多种学习目的的巨大资源，这27名参与者的声音证明了这一点。此外，