Özet:

The aim of this study is to examine the development of 9th grade students' operation flexibility in the context of equations containing algebraic fractional expressions. In this direction, the concept of transaction flexibility is discussed. The method of the research is the "teaching experiment" model, which is considered among the qualitative research approaches. In addition, "clinical interviews" and "document review" were conducted to support this. The participants of the research are four ninth grade students. Partially solved examples were used in order to improve the transaction flexibility of the participants and were asked to make choices among the solutions provided that they indicate the reason. The data obtained (video recordings, field notes and practice papers) were subjected to descriptive and content analysis. Findings showed that partially solved examples and solution preferences positively affected the participants' transaction flexibility. In addition, the results of the permanence clinical interview performed approximately 3 months after the application show that this effect is permanent, although there is a partial decrease.

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