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In response to the long-term challenges of skills shortages and mismatches, many countries worldwide have made significant investments in STEM education. However, to obtain a comprehensive understanding of the progress of global research on the implementation of STEM education, it is essential to compile case studies on STEM education. Therefore, we conducted a bibliometric analysis of 750 publications from Scopus database to assess the bibliographic content of case studies on STEM education from 2006 to 2022. Our main findings show that the first case study on STEM education dates back to 2006, and research in this direction has grown enormously and continuously over the last five years (counting for 72.9%). The most influential articles in the field are cited mainly in the background citations section and help provide an initial perspective for readers to understand the insights discussed later in the study. The most popular journals publishing case studies in STEM education are of good quality, ranking highly in Scopus and Web of Science categories. The analysis results show three main research directions: STEM education in higher education, STEM education expands to STEAM, and STEM education activities in K12-education.

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This paper reports high school teachers’ attitudes toward English as a lingua franca (ELF) and their classroom EFL teaching practices in a province in Vietnam. This mixed-methods study involved 109 high school teachers from 11 high schools in answering the questionnaires, and 22 of them were invited for semi-structured interviews. The findings indicated that high school teachers had positive attitudes toward ELF in three attitude components, including cognitive, affective, and behavioral attitudes. Additionally, they integrated activities for the promotion of ELF to their students in relation to eight sub-variables from cultural knowledge, vocabulary, pronunciation, and grammar to four language skills of students. Although facing difficulties in designing activities for ELF promotion, high school teachers still tried their best to introduce the existence of ELF and help their students accessible to the use of ELF in language learning. This study featured some limitations, but it can be of reference for the research context and other similar ones.

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