Özet:

Problem solving skill is the core of mathematics education and its importance cannot be denied. This study specifically examined 56 freshmen pre-service mathematics teachers’ problem solving processes on a specific problem with the help of Geometer’s Sketchpad (GSP). They were grouped into two-person teams to solve a problem called "the mirror problem". They were expected to solve it by means of GSP. According to their works on GSP and related reflections, there appeared two different solution methods for the problem. However, the results of the study revealed that pre-service teachers could not visualize the problem in their mind and apply it to GSP. More generally, they found the problem hard to solve. They experienced difficulty in transferring the static drawings into dynamic environment and in observing the manipulations on GSP.

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