During September 2025, Suphan Fayong focused on improving the documentation and navigation experience in the microsoft/Data-Science-For-Beginners repository. Suphan identified and resolved a bug affecting quiz navigation by updating Markdown-based README files to ensure quiz URLs correctly matched each lesson, thereby aligning the user journey with the intended learning flow. Additionally, Suphan corrected mislabeled quiz timing from "Post-lecture quiz" to "Pre-lecture quiz," clarifying the sequence for learners. The work demonstrated careful attention to documentation accuracy, version control discipline, and clear commit messaging. Suphan’s contributions enhanced the repository’s usability, though the scope was limited to documentation and navigation fixes.