Özet:

The purpose of this study is to investigate the effect of letter writing, a writing to learn activity, on the student’s academic achievement and attitude in science and technology course. The research is a semi-experimental research with an experiment-control design and it was conducted with a teacher and 61 students in the 7th grade of an elementary school located in the east of Turkey. The students who made up the sampling were determined randomly as the control (A) and the experiment group (B). Experimental group students expressed their learning by a letter writing to the 6th grade students whereas students in the control group weren’t expressed their learning by writing task. Before the unit of the light were taught, the pre-test which is topic based was carried out and after the unit was finished, post test was carried out. Pre and post tests were prepared according to the subjects taught in the unit of the light. The results of the post-test which were carried out at the end of the subject and topicbased revealed that between the students of group A and B wasn’t significant difference statistically but there are differences between these classes according to effect size calculation. Group B, and A have small effects when they are compared to the class. On the other hand, the analysis of data obtained from the science and technology attitude scale revealed that there was not a statistically meaningful difference between the group A and B

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