In this study, we tried to examine the experiences of the kindergarten teachers on the types of early childhood education activities, focusing on the mock classes of pre-school children. The research subject is a student who is taking lecture on infant education of A university in S city and 31 years 3rd student and secondary course lesson opened as a major course under study in 3rd grade 2 semester. The data collected was for 54 A4 paper, and the collected data was analyzed through analysis induction method. Through repetitive reading of the collected materials, we distinguish materials that give new ideas and materials that are not, extract meaningful words, give names to the terms that best explain the contents, classify the materials Analyzed through a detailed coding process that has been decided to discover repetitive themes. As a result of the research, the pre - school teacher successfully performed the type of activity that matched his / her personality. Second, the roles and skills required of teachers were recognized in difficult classes as the types of activities. Thirdly, failure or success in mock classes provides opportunities for further development of preschool teachers.