Abstract: The purpose of this study was to examine the impact of learning materials such as research on learning materials and mock lessons on elementary school students' learning stumbling blocks on university students' perceptions and mock lessons in the curriculum of subject pedagogy at teacher training universities. The research method was for university students to predict elementary school students' math mistakes before and after the curriculum. The results of the survey are as follows. (1) University students were able to predict elementary school students' mistakes after studying the curriculum. (2) The university students planned their lessons assuming that the children would make mistakes after the curriculum.
