Özet:

Listening loss is undoubtedly negative to the learning processes of students. Identifying the current learning conditions of students with hearing deficiency is important to design the learning environments appropriate to them. Therefore, the aim of this study is to identify the level of understanding of the geometric concepts of students with hearing deficiency according to the van Hiele geometric thinking model, which is an important place in geometry teaching, and the relationship between these concepts. A picture was made by painting the geometric levels of thinking of students of 5th, 6th, 7th and 8th classes with hearing deficiency for this purpose. Since this image is performed by the state-of-the-country determination, the model of this work is cutting-edge scan. The study was conducted by 126 students with disabilities to attend high school. The findings obtained were presented by interpretation of frequencies and percentages through cross tables. The study found that 92 of 126 students with hearing deficiency (73) were at pre-identification level. 31 of the same students (24.6%) were ranked at the visual level. Of 126 students, only 3 (2.4% of students were ranked at the analysis level. In light of the findings obtained, the geometry teaching that will be carried out to high school students with hearing deficiency has been suggested to design learning environments using language, samples and materials suitable for the current learning conditions of students.

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