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Technological pedagogical and content knowledge (TPACK) has been one of the steering theoretical concepts widely employed by researchers in order to examine and develop teachers' knowledge of integrating technology into teaching. Existing research on TPACK shows little about in-service secondary school science teachers' TPACK through a quantitative approach. The purposes of this study were to explore TPACK of secondary school science teachers using a new contextualized TPACK model. Associations between in-service teachers' TPACK and other factors were also examined. The TPACK questionnaire was mailed to secondary schools randomly selected across different parts of Taiwan, and return envelopes were provided for completed questionnaires. There were 1292 science teachers from secondary schools for factor analysis. An independent samples t-test was conducted when there were two groups (i.e., gender) to be compared for TPACK. ANOVA was conducted when there were more than two groups (i.e., science teaching experience) compared for TPACK. The results indicated that secondary science teachers' TPACK was statistically significant according to gender and teaching experience. With the consideration of other TPACK sub-components, male science teachers rated their technology knowledge significantly higher than did female teachers. Experienced science teachers tended to rate their content knowledge and pedagogical content knowledge in context (PCKCx) significantly higher than did novice science teachers. However, science teachers with less teaching experience tended to rate their technology knowledge and technological content knowledge in context (TPCKCx) significantly higher than did teachers with more teaching experience. The study shows how gender and teaching experience were influential factors for secondary school science teachers' TPACK. The research implications of this study are provided along with suggestions.

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Although there is a growing interest in mobile learning, there are limited studies that focus on student knowledge acquisition. As applications and usages of mobile technology have become more and more accepted, it is important and meaningful that researchers and practitioners of mobile learning understand the potential factors that could influence learning outcomes. Accordingly, the primary purpose of this study was to investigate the roles of mobile technology playfulness, users' resistance to change and self-management of learning in mobile English learning outcomes (MELOs). A case study approach was utilized in this study mainly because the questions of interests were closely related to the usage of electronic dictionaries and their effects on mobile learning outcomes. The participants of this study were all undergraduate students from 10 undergraduate programs of the center for general education at one university in Southern Taiwan. A total of n = 167 undergraduate students with experience using an electronic dictionary to learn English participated in this study. The study results indicated that perceived playfulness and self-management of learning had positive influences on MELO and that users' resistance to change was negatively associated with MELO.

Ongoing professional development for college teachers has been much emphasized. However, previous research on learning environments has seldom addressed college students' perceptions of teachers' PCK. This study aimed to evaluate college students' perceptions of a physics teacher's PCK development using a newly developed instrument and workshop intervention. A mixed method design was employed incorporating both quantitative and qualitative techniques. The survey ''Assessing Students' Perceptions of College Teachers' PCK'' was adopted as the instrument of research. This survey was conducted twice in this study; with the pre-test carried out during the mid-term exam and the post-test given in the last week of the semester. The results indicate that only SMK and IRS showed significant difference in the four categories of the survey, while IOC and KSU did not. Furthermore, the organized workshops helped the case teacher to better understand students' prior conceptions of the subject matter and learning difficulties, and further facilitated her adjustment of instructional strategies. The limitations of this study are discussed and suggestions for improvement are also provided.