The research project assignment can create meaningful opportunities for students to apply sociological concepts. For grading these projects, assessment rubrics are useful pedagogical tools to evaluate students’ abilities in achieving course learning objectives. In this study, I analyzed final research papers collected over multiple semesters in my undergraduate Methods of Social Research course. My goals are to (1) evaluate the grading rubric’s effectiveness in enabling students to meet course objectives and (2) identify improvements in students’ outcomes from revisions to the rubric over time. Findings indicate that rubrics can provide students the information needed to apply course concepts to their work and that rubric revisions are necessary to ensure validity, reliability, and equity across grading. In conclusion, I provide suggestions for implementing a semester-long research project assignment and initiating iterative revisions to rubric criteria.