Objectives The purpose of this study is to find out the effectiveness of early childhood education department K-project subjects using flipped learning, focusing on career motivation, career preparation behaviors, and career adaptability.
 Methods For this, SPSS 25.0 was used to verify the statistical significance between pre-average score and post-average score of career motivation, career preparation behaviors, career adaptation for 40 early childhood department students who took the K-project course at A university in Chungcheong-do. The tendency (M, SD) and normality (skewness, kurtosis) of study variables were analyzed, and reliability was presented as Cronbach's alpha. As this study was analyzed by verifying the difference between the pre-average score and the post-average score, it was confirmed in the 95% confidence interval by the corresponding sample T-test, which is a paired sample verification.
 Results These are the main findings. First, as the result of analyzing the descriptive statistics for each measurement variables, it satisfied the normality, and the post-average score had improved, compared to the pre-average score. Second, the effects of early childhood education department K-project subjects using flipped learning on career motivation, career preparation behaviors, and career adaptability were found to be statistically significant. In other words, considering that the post-average score had improved statistically significantly compared to the pre-average score, it can be interpreted that the effectiveness of this subject has been verified.
 Conclusions As the results of this study, it is meaningful in that it confirms the importance of the K-project subject for pre-service early childhood teachers and provides basic data for refluxing the curriculum of this subject. Based on these research results, I would like to suggest specific ways for pre-service early childhood teachers to explore, plan, and practice their careers through the K-project curriculum.
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