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The purpose of this study was to build a model that predicts the relationships between the Technological Pedagogical Content Knowledge (TPACK) competencies and information and communication technology (ICT) usages. Research data were collected from 3105 Turkish preservice teachers. The TPACK-Deep Scale, ICT usage phase survey and the ICT usage level survey were used to collect the research data. The structural regression model was conducted to test the model regarding the fact that ICT usage phases and ICT usage levels were predictors of TPACK competencies. The ICT usage phase was a statistically significant predictor of TPACK competency for all such sub-factors of the TPACK-Deep Scale as design (β = 0.12; p < 0.01), exertion (β = 0.20; p < 0.01), ethics (β = 0.93; p < 0.01) and proficiency (β = 0.41; p < 0.01). Similarly, the ICT usage level was a statistically significant predictor of TPACK competency for all such sub-dimensions of the scale as design (β = 0.23; p < 0.01), exertion (β = 0.12; p < 0.01), ethics (β = 0.78; p < 0.01) and proficiency (β = 0.21; p < 0.01). The research findings demonstrated that ICT use based on ICT usage phase and level and technology use knowledge and skills also influence overall TPACK competencies. When ICT usage phases and/or ICT usage levels are increased with the help of ICT training, it could be stated that TPACK competencies might be influenced; however, certain sub-dimensions might be influenced more, and some dimensions might be influenced less.

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The rapid development and easy accessibility of internet and personal computers have increased their use in educational environments as well as in every field. In schools, responsibilities of teachers in using technology have increased within the scope of educational processes and management processes and administrative level, and indirectly it has been determinative in their behavior towards the institution. In this respect, teachers' technostress levels which are the pressure they incur in the use of technology, and psychological capital levels which are the positive organizational behaviors, have been investigated in the present study. Two different scales were used in the research conducted with the participation of 228 teachers at different school levels in the academic year of 2016-2017. At the end of the study, it was found that teachers had a high level of psychological capital and a medium level of technostress, and there was a moderate and inverse relationship between their psychological capital and technostress levels. In addition, as a result of the structural equation modeling, it was found that the teachers' technostress levels were important indicator of their psychological capital levels. In this respect, it can be stated that measures to reduce the technostress level will increase the psychological capital level.

The use of computer games is becoming more and more common among children thanks to its many features; from multimedia opportunities to motivation. This increase in its use also increases the importance of educational games. The purpose of this study is to investigate the effect of the use of educational games in education on the academic success, motivation and attitudes of elementary school students. The participants of the research consist of 90 students studying in a public primary school in the 2017-2018 academic years. The research is also important for carrying out with primary school students as younger individuals who are missing in the literature. In the research designed in the quasi-experimental model, an experimental process was carried out with two different units ("In the Classrom" and "Numbers") in the English lesson, and it was observed that the educational games increased the students' access to the lesson. On the other hand, while educational games caused a difference in motivation towards the English lesson, no difference was found in the attitudes towards the lesson.   Keywords: Digital game, educational game, motivation, attitude,