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The mean laboratory homework score from the first four and last four laboratory courses was also calculated. Paper exams were also conducted after TOE and SOE. The results show that SOE is more acceptable to students than TOE. Significant differences (P less then 0.05) were observed in terms of uniformity of questions asked, syllabus coverage, and anxiety levels. In addition, SOE improved students' performance in the laboratory course explored here. We contend that SOE shows promise as an effective assessment tool in laborato