Learning from mistakes is an essential component of medical and nursing education. This retrospective study examined medical errors and near-misses committed by nursing students at more than 200 prelicensure programs. Of the 1,042 errors and near-misses reported, medication errors were most common (59%). Three primary contributing factors to errors and near-miss events were identified – (1) not checking patient identification, (2) not checking a patient’s allergy status, and (3) not following the “rights” of medication administration.