The purpose of this cross-cultural study is to investigate comparative students' problem behaviors and classroom behavior management strategies for students in urban public schools between teachers in the United States and Korea. This study incorporated data collected from two different teacher self-reported survey questionnaires, the Student Behavior Questionnaire (SBQ) and the Teacher Surveys (TS). The participants were 116 American teachers and 167 Korean teachers who were teaching high school students. Descriptive analysis and content analysis were implemented to analyze data. The analysis revealed that there were differences in severity of student problematic behaviors and in student disciplinary procedures and behavior management strategies implemented by high school teachers between American and Korean school systems. However, owing to the characteristics of the cross-cultural study, one should be cautious to generalize these findings to other settings because of some intrinsic cultural and historical factors. (Contains 2 figures and 4 tables.)