  English as a Foreign Language (EFL) students often struggle to deliver oral
presentations due to a lack of reliable resources and the limited effectiveness
of instructors' feedback. Large Language Model (LLM) can offer new
possibilities to assist students' oral presentations with real-time feedback.
This paper investigates how ChatGPT can be effectively integrated into EFL oral
presentation practice to provide personalized feedback. We introduce a novel
learning platform, CHOP (ChatGPT-based interactive platform for oral
presentation practice), and evaluate its effectiveness with 13 EFL students. By
collecting student-ChatGPT interaction data and expert assessments of the
feedback quality, we identify the platform's strengths and weaknesses. We also
analyze learners' perceptions and key design factors. Based on these insights,
we suggest further development opportunities and design improvements for the
education community.
