ABSTRACT. The purpose of the present study is to determine the effects of Frayer model on the development of vocabulary knowledge in social studies. A quasi-experimental nonequivalent control group design was used in the study. For the research, an experimental (N=19) and a control group (N=18) were randomly selected. While Frayer model as text based organizer was utilized on vocabulary instruction in the experimental group, the definitional and contextual approaches by integrating were used in the control group. This research was implemented at a state school with the 4 th grade students in Bayburt, in 2013-2014 academic season. The scale, which was developed by Wesche and Paribakht (1996) and validity and reliability of which were examined and adapted to Turkish by the researcher, was used to determine the students' vocabulary knowledge level. As for the results, it was found that the experimental group was more successful in vocabulary knowledge through the meanings of the target words by enlarging their vocabulary capacity in-depth. The data obtained from the study demonstrated that Frayer model facilitated the students to identify relevant, irrelevant attributes, examples and non-examples of the concepts and uncover the relationships and hierarchical structures between the concepts, thus guide to generate the meanings of terms by activating prior knowledge. Therefore, it helps to the students facilitate development of vocabulary knowledge and vocabulary acquisition. Keywords: Frayer model, vocabulary knowledge, social studies, vocabulary development, definitional and contextual approaches
SUMMARY
Purpose:The aim of the present study is to investigate the effect of Frayer model as graphic organizer on vocabulary knowledge in social studies. As a result of literature review, it was found that there were not enough studies on the vocabulary instruction about Frayer model in Turkey. However, when the international research studies in literature were examined, it was found that there were so many studies about Frayer model on issues of vocabulary acquisition, literacy skills, reading comprehension, and vocabulary development. In accordance with this purpose in the research, it is expected that the present study might strengthen the theoretical bases of vocabulary instruction in social studies in the light of experimental evidences and help to solve the problems faced in vocabulary development. It is also believed that the findings of this study might provide an inner vision for other studies carried out in vocabulary instruction.