While the environment of schools become more and more complicated, the improvement of teachers' skills in teaching and management is required. In this study, we focus on the development of a Wizard-of-Oz (WOZ) platform of simulated school environment, which can be utilized for teacher training or the examination of teacher recruitment from remote. This system is comprised of two front ends, one is a simulated classroom for the trainee, the other one is the interface for the system operator / investigator. The virtual classroom contains a number of virtual students who are controlled by the operator from the remote. The operator can observe the trainee from a dedicated interface and control the behaviors of any individual student as well as the atmosphere of the whole class. The whole-class atmosphere created by relatively large number of students is modeled as a concentration-arousal two dimensional space. The prototype system is evaluated with subject experiment and the results are reported.
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