In this study we purposed to prepare basic data to support learners’ improved school adaptability by analyzing the characteristics of latent groups of at-risk learners in blind spot of education across school levels. For this, total 953 elementary, middle, and high school teachers across the whole country were collected and they evaluated the characteristics of at-risk learners in blind spot of education by using Teacher’s Scale. Then we classified latent classes of learners by using latent profile analysis and named each group considering the characteristics of each latent group. Also, we identified if there were any differences in the characteristics of each class. As a result of the study, latent groups of elementary school were classified into three groups: ‘Conduct and Interpersonal Relationships High Risk’, ‘Overall High Risk’, and ‘Learning and Cognition High Risk’ group. And latent groups of middle school into three groups: ‘Overall High Risk’, ‘Overall Low Risk’, and ‘Average Level of Risk’ group. Latent groups of high school were classified into four groups: ‘Overall High Risk’, ‘Average Level of Risk’, ‘Academic and Intrapsychic High Risk’, and ‘Overall Low Risk’ group. Finally we discussed the significances and limitations of the study and some suggestions for further studies.