There are pedagogical challenges for the ideal balance of online community building and interaction among students and instructors for HyFlex learning. One of the challenges focuses on how instructors can effectively select and design an online discussion modality to promote positive, vigorous, and encouraging online asynchronous discussion to engage students. This research study adopted an exploratory mixed method approach designed to investigate student’s satisfaction level and academic performance with different interface design platforms for online discussion in HyFlex delivery modality education courses. Study results indicated that different interface design for online discussion platforms had a significant impact on students’ academic achievement for online discussion assessment although there is no significant impact on students’ overall satisfactory levels toward the courses. Implications from the results suggest a need to design and integrate effective online discussion platform to engage students and promote social learning in HyFlex learning environments.