This research paper develops and evaluates an online problem-based learning (PBL) model to boost undergraduate students' self-regulated learning (SRL). It uses a mixed-methods approach, including expert reviews and a trial implementation, demonstrating a significant positive impact on SRL scores. The model emphasizes self-directed learning, collaboration, and instructor scaffolding within a digital environment. It's structured into six chapters covering a literature review, methodology, results, discussion, conclusions, and recommendations. Key topics include online learning models, PBL, SRL, and developing and evaluating an innovative online learning framework.