Course research projects that use easy-to-access real-world data and that generate findings with which undergraduate students can readily identify are hard to find. The authors describe a project that requires students to estimate the current female-male earnings gap for new college graduates. The project also enables students to see to what extent female-male differences in college majors and types of first jobs affect the gender earnings gap. The data set is the annual salary survey reports of the National Association of Colleges and Employers (NACE) and is available in many colleges' career placement offices. Moreover, the estimation procedure requires only basic Excel calculations. (Contains 1 table and 11 notes.)