While many students who start at a community college intend to transfer and complete a bachelor’s degree, most of them are not successful. One of the impediments to improving outcomes for these students has been the lack of widely available measures of institutional effectiveness in serving transfer students. In this guide, the authors provide instructions for community colleges that want to use National Student Clearinghouse (NSC) data to measure their effectiveness in serving transfer students. To do so, colleges will need to access both NSC enrollment and degree file data on their students.