“…Examples of metrics that were used to study the academic performance were average final course scores, 20,[25][26][27] a range of final course scores, 28,29 , average student scores on various course assessments such as examinations, 20-22, 24-26, 30, 31 quizzes, 20,23,32,33 or other assignments. 20,26,27,33,34 In a few cases where the course intervention was limited to a certain part of the course the metric used to assess academic performance was not the entire assessment but the score on a group of questions that were related to the intervention. 19,23,30 Final course letter grades 20,21,25 and the number or percentage of students who passed or failed examinations 21,22,31 were also used as metrics for academic performance.…”