Examination of students' developments regarding the concept of rotational symmetry and abstract levels

The purpose of this research; it is to reveal the knowledge and understanding of the first year undergraduate students of Primary School Mathematics Teacher Education about rotational symmetry in a given geometric figure by examining them. This research, which was designed within the framework of one-to-one teaching experiment, one of the qualitative research approaches; it was conducted with three students in the fall semester of the 2020-2021 academic year. The data of the research; it was collected by video recording and researcher diary of four clinical interviews with all students one-on-one once a week. Continuous analysis and retrospective analysis were used in the analysis and interpretation of the research data. Based on the research findings; parameters have been determined for each of the abstraction types and levels related to the concept of rotational symmetry. Based on the research findings; it has been determined progresses regarding the concept of rotational symmetry. A student at the experimental abstraction level of Piaget's abstraction level reached the 3rd level reflective abstraction level after the teaching experiment the other student at the experimental abstraction level reached the 2nd level reflective abstraction level. And the student who did not have any level reached the 1st level reflective abstraction level. It has been determined that making use of daily life examples and making rotationally symmetrical drawings in rotational symmetry teaching are extremely important for students to develop their knowledge and understanding of the concept of rotational symmetry and make reflective abstraction.