The aim of the present paper is to report and reflect on the teaching practice in elementary / middle schools in the United States by a group of Japanese graduate students. As part of the requirement in an elective course in Overseas Teaching Practice 2010, the 8 Learning Science major students and 2 Social Studies major students of Hiroshima University, Graduate School of Education, planned and gave lessons in English on Japanese society and culture in the public school classrooms in the State of North Carolina, the United States in September, 2010. The major achievements in all the participants were 1) development of learning materials to enhance crosscultural understanding, 1) empowerment of crosscultural understanding through comparisons of Japanese/American cultures, and 3) development of global communicative competence through observations and presentations. Furthermore, an overall program evaluation was held for next year's program.