This paper presents a novel learning method for hearing-impaired students in an open space. The method is characterized by the use of a handy laser-show device newly developed by the authors. The learning difficulty of hearing-impaired students comes from the fact that they cannot smoothly interact with each other among students, teachers, and target objects. In a classroom lesson, we are often familiar with the situations, while, in case of an open space, so far, we have had few effective methods. To solve the issues in open space situations, we describe a new learning method, by which we show direct explanations about the target object through a handy laser-show device: Big Fat Wand (BFW). BFW is designed to have capabilities of 1) being carried easily, and 2) presenting characters, images, and animations through authoring tools on a PC. To evaluate the effectiveness, we carried out intensive experiments with hearing-impaired students of Tsukuba University of Technology. The results revealed 1) that a lecturer with no experience or expertise in teaching hearing-impaired students is able to give good lectures with BFW, and 2) that BFW explanations with simple figures about the structure of the target objects are especially educative for hearing-impaired students. We believe that the proposed method will be of use for any other open-space lectures.
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