Self-regulated learning (SRL) has been extensively explored in psychological research, particularly for its influential role in online education systems. Despite its importance, little is understood about how SRL-focused training impacts students' academic experiences. This study seeks to address this gap by examining SRL interventions within Massive Open Online Courses (MOOCs). Using a quasi-experimental design, the research involves both control and experimental groups. SRL strategy questionnaires and learner self-evaluations for speaking skills were administered before and after the training. Learning diaries were used to analyze students' application of SRL strategies in the MOOC environment, and pre- and post-tests measured the intervention's impact on speaking proficiency. Additionally, descriptive statistical analysis was conducted on the questionnaire results, complemented by thematic analysis of students' reflective journals. T he findings revealed a strong positive correlation between EFL students' SRL strategy usage and their speaking course outcomes. Reflective journal analysis indicated that students tailored SRL strategies to their learning processes within MOOC contexts. The study provides practical insights for incorporating SRL training into MOOC-based learning and offers a theoretical foundation for promoting SRL across diverse educational systems.