Background: For most of the high school students, ‘dental care’ is likely to be difficult to understand. It has been reported that only half of students received treatments among the high school students who were advised to visit dental office for treatment of dental caries and gingivitis. Thus, the oral health education is critical for high school students in order to enhance the understanding of the dental caries and gingivitis. Materials and methods: We conducted dental education classes to four high schools (62 students) in the Vaishali district, Bihar. After the classes, we asked the students to submit the descriptions of impressions and evaluated those descriptions. Results: We found that most of students have had the feeling that the classes were interesting and useful. The high school students have begun to become interested in the dental care and that their motivation for study was increased. Conclusion: We will continue these classes to high school students in the future and would like to contribute to prevalence and enlightenment of dental care.