In this paper, we report on the findings with regard to classroom activities and their time use in a number of mobile technology-mediated classrooms at Hong Kong. The data was collected from a mobile learning project specifically designed to promote students' group and independent learning across a range of subject disciplines through using mobile devices within school environment. A total of 30 lessons in 10 primary and secondary schools were videotaped and analyzed. Results indicate that mobile devices can support establishing a well-balanced structure of classroom activities controlled by both teachers and students, where about 40% of the total class time was allocated to direct teaching and 40% was assigned to students' learning in independent and/or collaborative ways.
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