D-Study for the agreement on theFlashcard variance component of recall accuracy. G-coefficient for the flashcard component of recall accuracy, using different combinations of number of students (x axis) and sessions (colored curve sets). The stroked curve set represents quiz group agreement, and the dashed curve set represents study-quiz group agreement. It can be seen that with a small number of students and sessions of using the study and quiz modes (dotted curve set) or quiz mode alone (stroked curve set), substantial (>60%) and strong (>80%) flashcard agreements on recall accuracy can be obtained, respectively. High flashcard agreement for recall accuracy denotes that systematic differences in flashcards explain recall accuracy differences. This information may be useful to inform educators of learning materials that may require review.