Web-based homework (WBH) systems are being utilized in many college mathematics classrooms. Do these systems have an effect on student outcomes when compared to traditional paper-and-pencil homework (PPH)? This study compares student outcomes in multiple sections of a required mathematics course. The sections differed only in the homework delivery method: WBH, PPH, or a combination of the two. Among other results, it was found that students were more likely to attempt and to receive higher homework grades with WBH than with PPH. However, the study found no significant difference between the exam grades of students in the WBH sections and the students in the PPH sections. These and other findings are presented in this paper. (Contains 7 tables.)