Özet:

The present study aimed to determine the criteria that middle school mathematics teachers considered in assessing the difficulty levels of problems they posed on the addition and subtraction of fractions. Furthermore, a conceptual analysis was made on the problems posed in order to identify potential errors. Five teachers from schools in the central districts of Erzurum participated in the study. Data were collected through videorecording the focus-group interviews, as well as the administration of the problem posing test designed for the free problem posing activity. Collected data were analyzed according to the theoretical framework of the mathematical knowledge for teaching. With respect to increasing the difficulty level of a problem, teachers were determined to focus on the structure of the operation in general and it was found that they had a limited perspective in considering different criteria. Some of the teachers were also identified to have errors in posing problems

Anahtar Kelimeler: