Developing reading and writing in English through e-portfolio: Formative experimental design

In this study, it is aimed to examine the impact of e-portfolio usage on English reading and writing skills and self-efficacy beliefs. The research was conducted in a state high school institution located in the city center of Siirt during the second semester of the 2022-2023 academic year. The study group consisted of 29 students enrolled in the 10th grade. Convenience sampling was used in the research. Formative experimental design was used as a research design. Only the experimental group was involved in the study and there was no control group. Due to the structure of the formative experimental design, quantitative data were collected in the pre-test and post-test phases while only qualitative data were collected during the implementation of the study. In the quantitative dimension of the research, the reading and writing dimensions of the "English Self-Efficacy Belief Scale" and "English Reading and Writing Achievement Test", developed by the researcher, were used as data collection tools. In the scoring of the English writing achievement test, "The Newly Developed Essay Scoring Rubric" was utilized. In the qualitative part of the research, a semi-structured interview form developed by the researcher and researcher notes were used as data collection tools. In the analysis of the quantitative data, TAP programme was used for the achievement test development and the dependent sample t-test was used for the pre-test and post-test comparisons of the reading and writing achievement test and the reading and writing dimension of self-efficacy belief scale. Pearson Correlation test was used for the alignment of scores given by scorers in the writing section of the achievement test. Content analysis was utilized in the analysis of qualitative data. The results of the research indicate that the use of e-portfolios contributes to an increase in students' reading and writing skills and enhances their self-efficacy beliefs in these skills. Key Words: Reading Skill in English, Writing Skill in English, Self-Efficacy, EPortfolio, Formative Experimental Design.