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Mixed reality (MR) is the merging of real and virtual worlds to produce new environments and visualizations, where virtual and physical objects can interact with each other in real time. The traditional fixed single camera desktop AR platform provides a new display and interaction mode for experimental teaching in middle schools. However, to observe the experimental phenomenon, we have to use a fixed-position screen with a fixed viewing angle which makes the experiment operation unnatural. The use of traditional Hamming code mark can not let people know what kind of AR object it is. In this paper, we propose a virtual experiment platform that can conduct various experiments in middle school. In this virtual platform, users observe the experimental phenomena with a pair of movable MR glasses. Meanwhile, the mark images required for interaction are customized and indicates what the AR object is. In this way, users can select the AR objects they need easily during the experiment instead of memorizing the AR objects corresponding to different marks in advance. However, the value and importance of different modules are different. What criteria do we use to judge the value of different modules? Kano's Theory provides the guidance of requirements classification attributes for the research of virtual experimental platform. Therefore, we evaluate five requirements classification attributes, including the function of camera capture, custom mark, visualization of magnetic line, voice interaction and multi-camera tracking. Nineteen pedagogical volunteers participated in our experiment. Experimental results prove that our platform stimulates the users’ interest in learning. Further, most participants believe that it would promote the development of experiment education effectively in middle schools.
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