The purpose of this study is to analyze the experience of prospective secondary school teachers during COVID-19 and analyze the educational meaning by drawing implications for the operation of secondary education practices. To this end, reflective writing and ill-structured questionnaire responses of 40 prospective secondary school teachers attending H University were analyzed using frequency analysis and text mining techniques. According to the analysis, due to the influence of COVID-19, there were cases where face-to-face classes and non face-to-face classes were not available during the teaching practicum period, and there were often no opportunities for student counseling. The meaning of the educational practice was found to be a time to gain confidence in the teaching profession, to contemplate career decisions, to improve and gain worth, and to motivate and change the perception of secondary school teachers. The skills required by teachers were organized into 7 categories included expertise in contents knowledge. It was found that more practical education support and preparations for online classes were needed as the educational support that universities should provide before training. Also, the difficulties that they experienced during the training included reflecting and solving real-life classroom experiences, efforts to effectively engage students in classes, building relationships with students, confusion and difficulties due to non face-to-face classes, and the lack of feedback and communication due to the limited opportunities for education practice. Based on the research results, discussions and suggestions on the improvement of the secondary education teaching practicum system were proposed.