Özet:

The purpose of this study is to investigate problem solving processes of prospective elementary mathematics teachers on locus problems by using paper-pencil and Dynamic Geometry Software (DGS). In the research designed as a case study the partipicants were 19 senior prospective teachers. This data was collected by using diary notes and worksheets of the prospective teachers. The qualitative data were analyzed by following the stages suggested by the Miles and Huberman (1994, p.10): data reduction, data display and conclusion drawing/verification. In the research it was determined that prospective teachers experienced various situations such as diffuculty in understanding the question, guessing the answer, and making generalization in paper-pencil application. Contrary to paper-pencil solutions in the process of the software solution, prospective teachers got opportunity to try different solutions, to make hypothesis, to test their hypothesis and to make generalization by using the software and thus they reached expected solutions.

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