This study aimed to research and clarify teacher trainees' perceptions and thoughts as the basis for acquiring and improving teaching competence that enable them to respond to a variety of sicence learning, by focusing on reflection on traial teaching of elementary school science in the teacher training course. The findings were mainly the followings: (1) 8 categories were found as categories related to science teaching competence corresponding to diverse learning. (2) It was implied that after having each learner think about their predictions, by having them present and share their predictions for all groups, teacher trainees will be able to notice various predictions and think about how to respond to such diversity. (3) From the viewpoint of the UDL guidelines, some descriptions were found related to each of the three principles; these are 'Provide multiple means of representation', 'Provide multiple means of action & expression', and 'Provide multiple means of engagement'.