Homework is an important out-of-class activity, crucial to student success in engineering courses. However, in a firstsemester freshman engineering course, approximately one-fourth of students were completing less than 80% of the homework. The purpose of this study was to examine students' attribution of their low completion of homework and suggest corresponding interventions to help students with different attribution types. A qualitative approach was applied using semi-structured interviews for data collection. The interviewees were students who were on track to complete less than 80% of the homework. Students in the study attributed their low rates of completion to multiple factors. We coded and summarized students' attributions of homework incompletion according to Weiner's attribution theory and suggested corresponding interventions for students with different attribution types. Results show that most students attributed their failure to complete their homework to external reasons rather than internal reasons. A large portion of student's attributions for low homework completion was due to poor time management skills. Some students attributed low homework completion to unstable factors such as illness, transition, or adjustment problems. A small portion attributed low homework completion to uncontrollable reasons, such as sickness and homework difficulty. Students' reasons for homework incompletion varied across the three dimensions of Weiner's attribution theory suggesting that a variety of intervention techniques is required. In addition to use of widely adopted interventions such as first year seminars, tutoring, and tutorial sessions, intervention techniques based on attribution theory may be necessary to employ, to help students avoid negative emotional and behavioral consequences of homework incompletion.Keywords: Attribution; Motivation; First Year Students; Homework INTRODUCTION ngaging in homework assignments is one of the most important parts of students' out-of-class learning. It is a critical avenue for deepening students' understanding of in-class knowledge, it helps students build their own knowledge system, and in general, homework contributes to overall academic success (Cooper, Robinson, & Patall, 2006;Vatterott, 2009). While participation in homework has been shown to have positive impacts on learning, many educators have difficulty in getting their students to complete assigned homework problems. Research on academic motivation has provided several interventions for encouraging students to complete homework assignments, but this research does little to highlight the reasons why students perform at different levels of homework completion rates in a particular course or to suggest which interventions are most appropriate for these different reasons. This paper discusses a qualitative research study that sought to understand the reasons why students do not complete homework assignments. Using attribution theory as a guiding framework, this study sought to understand the student-defi...