Abstract: This study uses action research design. Subject of research is in the portfolios of students learning to write essays essay PBSI Unissula Semarang. The study consisted of two cycles, each cycle consisting of planning, action, observation, and reflection. Data from this study were obtained with test instruments and nontes. Test instruments in the form of an essay essay writing test. Meanwhile, nontes instruments such as observation, interviews, and journals. Analysis of the test data with quantitative techniques, data analysis nontes while using qualitative techniques. The purpose of this study was to determine whether there is any effect of portfolio assessment and feedback for learning to write essays essay portfolio strategy.

Keywords: portfolio assessment, writing, and essay essay

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