Subjects comprising the population of this study were recruited from 6 high schools of Khovd province. Total of 104210-12 aged children were participated in this study. Oral health education knowledge of study population was notenough. This range of age is most healthy period of permanent dentition. Therefore for these children giving informationabout healthy foods for teeth, importance of having good oral health behavior by oral health education program is veryeffective to prevent dental caries. It is necessary constitute oral health education program for children which is simple,cheap, and sufficient. Also for this oral health education program for high school children requires active participation ofschool teachers and parents.