I teach general courses in American history and specialized courses in American immigration. My regular undergraduate courses include a two-semester undergraduate survey of American immigration; a survey of the post-1865 era, required of history majors; an upper-division lecture course on the American Irish since 1700; and an upper-division readings course on American immigration and ethnicity. The emphasis in these courses is on providing students with the experience of being historians, introducing them to historical thinking as a form of interpretation. Students work with primary sources and develop their interpretations of these sources in the context of the secondary (historiographical) literature. At graduate level, I offer a research seminar on nineteenth-century American history and a colloquium on Irish global migration and I supervise doctoral students in American immigration, labor, and social history.