SafeAssign™ is a plagiarism prevention service, offered by Blackboard. Instructors can set up SafeAssignments in their Blackboard courses and let students submit papers to these assignments. As students submit papers, they are checked against SafeAssign's comprehensive databases of source material. The papers will then be delivered to instructors through the Blackboard Learning System together with the originality reports, with the results of the matching process, attached to them. (This information is taken from the SafeAssign Wiki, where you can learn more about SafeAssign, see sample reports, etc).
You can also learn more about SafeAssign from Using SafeAssign developed by UCit Blackboard support team. This document along with other useful Blackboard Guides and Tutorials is available at the Blackboard Help page. Click "Instructors" - "Guides and Tutorials" - " Using SafeAssign."
Librarians will be happy to work with you towards plagiarism prevention. Please refer your students to Using Information Sources Ethically and Legally, a student guide on plagiarism prevention.