In the literature, one can find many claims about how long a learning video should be, but only a few valid reasons and even less empirical evidence. It is argued that a video should be as short as possible according to the learners' attention span. Short videos shall prevent the learner from becoming too passive. The Segmenting Principle…

Teacher workshops attract teachers with common goals; they wish to improve their teaching practices and subject and information technology knowledge. The asynchronous online discussion is the main activity in teacher workshops. An analytical model was developed in this study to examine the temporal characteristics of collaborative knowledge…