The Effects of Electronic Portfolio Application on Improving Vietnamese High School Students’ Writing Ability: The Case Study of Three High Schools in Binh Duong Province

The research aims to investigate the effects of electronic portfolios (e-portfolios) on English as a foreign language (EFL) high school students’ writing ability, and teachers’ attitudes towards application e-portfolios in classes at three schools Binh Duong province. sample included 15 teachers 300 twelfth graders Facebook was chosen an e-portfolio platform where students created developed their personal e-portfolios. data were collected both quantitatively qualitatively through mixed-method study using tools pre-test, post-test, questionnaire (for students), semi-structured interview charge experimental classes). survey results showed that considerably impact EFL students' ability. also revealed challenges technological drawbacks concerning use these classes. For optimal courses, recommendations put forward those who are course taking well.