Özet:

Spatial skills are versatile and complex skills that we encounter in many areas of daily life. In this study, the effects of activities conducted through three-dimensional design programs on the development of pre-service primary teachers' spatial skills were investigated. The quantitative part of the research was carried out using one group pretest – posttest experimental design. 23 pre-service primary teachers participated in the study. Data collection tools are spatial visualization test and semi-structured interview form. In the applications, three-dimensional designs were created using unit cubes on the three dimensional design programs, rotated into different perspectives and then drawn on isometric papers by pre-service teachers. At the end of the 4-week practice, the spatial visualization test was reapplied and interviews were conducted with pre-service teachers about the activities. The data analysis results revealed that there was a significant increase in the mental rotation skills of pre service teachers but the activities could not provide a significant increase in their spatial visualization skills. Besides, it was found that pre-service teachers' opinions on practices were gathered under three themes: contributions to personal development, contributions to mathematics education, and the features of the programs. The results were discussed in light of the studies in the field.

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