Question - Group - Duplicate bookmarks - 44 views

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#1 Beth Kiggins on 13 Sep 10I created a group for my class. I want all the students to post 150 bookmarks by the end of the semester. I do not want duplicates. I tried to add a bookmark that was already added and it let me (and removed original post). Can I keep students from duplicating bookmarks, if so, how?
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