This paper describes experiences with on-line and in-class sections of a writing-intensive course, including a collaborative library literacy unit. It reports on a mid-semester software change and offers a comparative outcome assessment. The authors, whose experience reflects that of other on-line writing instructors, suggest that on-line students may self-select into an informal "elite" and make recommendations concerning course design, class size, and software needs. Keywords Online course, Online assessment, Teaching library, Writing In fall, 1999, Arizona State University West's College of Arts and Sciences, through its American Studies Department, offered an on-line section of English 315 (Writing for the Professions), a writing-intensive course that fills the university's literacy requirement as well as graduation requirements for programs in Management, Education, Human Services, and Arts and Sciences. It represented the college's first fully on-line co...