This study aimed at finding out performance and measurement estimation strategies of primary school fifth grade students in real life situations. In addition, the study has also investigated the relationship between students success and the strategy they used. Data were collected from 40 participants. Task-based interviews were conducted with 15 students representing different achievement levels in mathematics. The results of the study indicated that primary school fifth grade students had a tendency to primarily use rough guess strategy in order to determine the linear properties of real life objects. Comparison and prior knowledge+ comparison strategies were used secondly by the participants. The strategies used by participants varied according to the students achievement levels. Although high and typical achievers used comparison, unit iteration, prior knowledge, chunking and using a combination of these, low achievers used rough guess strategy more often. Implications for mathematics education at the elementary level were discussed.
Key words: primary school students, estimation, measurement estimation, measurement estimation strategies
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