For most undergraduates on the Hill, classes revolve around anxiety-inducing tests and essays that require countless hours of studying at Tisch Library. For some of their non-traditional peers, however, trekking uphill is far from a day job. Through the Office of Graduate Studies and the Osher Lifelong Learning Institute, Tufts offers area residents an opportunity to take classes at the university without officially matriculating. While both programs require their students to pay for classes, each is tailored toward its unique clientele.