Sean Horner enhanced the Sakai Gradebook rubric modal by focusing on user experience and accessibility improvements within the sakaiproject/sakai repository. He implemented CSS and Sass to center the modal and define its dimensions, resulting in a more consistent and usable interface for graders. By addressing layout and accessibility, Sean established a clearer UI baseline that supports future enhancements and smoother grading workflows. His work, delivered in Java and SCSS, targeted the specific needs of educators using the platform, ensuring the modal is both visually accessible and functionally robust. This contribution reflects a focused, foundational improvement over a one-month period.