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Mobile technologies open up new ways of fostering reflection in teacher education. With the intention of tying reflection closer to the actions in the classroom, facilitating multimedia recordings, providing prompts for reflection and fostering discussions between pre-service teachers, experienced teachers and university mentors, we developed the "Metapholio" app and tested it in the context of teaching internships. This app supports pre-service teachers in collecting noteworthy moments in the classroom by providing functionalities for individual and collaborative note taking. Notes can be created in the form of written text, photography, audio recordings and video recordings. Each note can be commented on and discussed with invited peers, experienced teachers and university mentors, who can also record moments themselves. Furthermore, the app makes it possible to select notes and attach them to more general written or spoken reflections on teaching and learning. Theoretical frameworks and writing prompts that are part of the app serve as scaffolds for such reflections. Peers, teachers and mentors can be invited to join the conversation on reflections. With the help of this app, pre-service teachers can, moreover, create their own multimedia mobile portfolio, which acts as a hybrid space for professional development in teacher education.Mobile technologies open up new ways of fostering reflection in teacher education. With the intention of tying reflection closer to the actions in the classroom, facilitating multimedia recordings, providing prompts for reflection and fostering discussions between pre-service teachers, experienced teachers and university mentors, we developed the "Metapholio" app and tested it in the context of teaching internships. This app supports student teachers in collecting noteworthy moments in the classroom by providing functionalities for individual and collaborative note taking. Notes can be created in the form of written text, photography, audio recordings and video recordings. Each note can be commented on and discussed with invited peers and mentors, who can also record moments. Furthermore, the app makes it possible to select notes and attach them to more general written or spoken reflections on teaching and learning. Theoretical frameworks and writing prompts that are part of the app serve as scaffolds for such reflections. Peers and mentors can be invited to join the conversation on reflections. With the help of this app, student teachers can moreover create their own multimedia mobile portfolio, which acts as a hybrid space for professional development in teacher education.

Background. To determine the optimal speed of computer-paced serious games, the interplay of cognitive load variables and game engagement variables can serve as combined criteria. Intervention. In order to test the effects of higher or lower game speeds on different types of cognitive load and engagement, the FRESH FOOD RUNNER game was developed, which teaches the harvest seasons of different fruits and vegetables. Method. In this study, N=58 6th grade primary school students are randomly assigned to play the serious game FRESH FOOD RUNNER at different speeds. Pre-and post-tests are used to assess learning gains, in combination with rating scales for different types of cognitive load and game engagement. Results. Results show that highest learning gains and lowest levels of extraneous cognitive load are prevalent at medium speed settings, which are neither too fast nor too slow. A similar pattern is apparent for student ratings of game engagement. Discussion and Conclusion. In consequence, learning gains, cognitive load and engagement variables can be regarded as suitable criteria to determine the optimal speed of serious games.

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