Özet:

Abstract: Writing in English teaching and learning is perceived as a difficult skill due to internal and external factors. This study investigated the effectiveness of two writing portfolios (working writing portfolio and showcase writing portfolio) on high school students’ writing achievement utilizing quasi-experimental design. The effectiveness of the two writing portfolios was tested by comparing pre-treatment and post-treatment samples using Independent Samples t test between both treatments. Regarding to .05 significance of level, the p value was compared to .025 for each side of 2-tailed research. The result showed p value .028 which was higher than .025. It signified that there was not significant different effect between both writing portfolios.

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