Purpose: The purpose of this paper is to investigate factors affecting university students' participation in discussion forum of electronic learning platforms of teacher--student interaction. Design/methodology/approach: One-stage cluster sampling was used and a cross-sectional survey of 113 university students from four courses was done. Findings: A combined model based on United theory of Acceptance and Use of Technology (UTAUT) and DeLone and McLean models serves as a research framework. Female and male students' behavioral intentions were affected by different factors. System quality affects male students' behavioral intention and information quality affects female students' behavioral intention. Social influence affects female students' behavioral intention but male students. Men are more focused on the hardware and women are more focused on the content of the message. Research limitations/implications: The research is limited by the nature of university students. User experience and underlying perceived risk are possible moderators. Dyad approach could be considered. One way to enhance students and teachers' academic discussion is to establish a closed university social media site. The site should be made mobile-friendly with chatbot included. Originality/value: The results support the validity of the proposed new research framework on e-learning platform by the constructs coming from two established models: UTAUT model and DeLone and McLean's model. Factors affecting intention and use behavior in discussion forum are different for male and female students. System quality affects male students' behavioral intention, while information quality affects female students' behavioral intention. Social influence affects female students' behavioral intention but not male students.