eng Oriental Scientific Publishing Company Biosciences Biotechnology Research Asia 0973-1245 2016-06-16 12 Spl.Edn.1 95 101 10.13005/bbra/1610 12640 article Mohammad Bagher Hadavand 1 Valiollah GerayeliMalek 2 Behzad Tadayyon 1 Malihe Aminzadeh 3 Farhad Jafari 4 Student of Iranian Traditional Medicine, ShahedUniversity, Tehran, Iran. Student of Iranian Traditional Medicine, Tehran University of Medical Sciences, Teharn, Iran. Department of Biochemistry & Biophysics, Tehran University, Tehran, Iran. Specialist of Community Medicine, Department of Health and Social Medicine, School of Medicine, Shahed University, Tehran, Iran. The impact of having breakfast on the increase of school subject grades is shown in some studies. Despite this, there is not much research done on the impact of breakfast consumption on course scores in Iran. The present study was aimed at evaluating the association between consuming breakfast and snack with religion school subject grede and the level of attention among high school students. This was a descriptive analytical and cross-sectional study conducted on 300 high school students of Tehran (Iran). Simple stratified sampling procedure was used. The data collection tool was a researcher-made questionnaire. Data were analyized using SPSS (version 20). The mean age of participants was 16.2 ±0.9 and the means of their GPA (grade point average) and religion course grade were 17.3±1.8 and 17.6±2.9, respectively. 72.6% of the students had breakfast everyday and 2.1% went to school without having breakfast. 64.6% of the students had snack at school. There was no correlation between breakfast consumption and level of alertness and attention in class and GPA, but religion course grades had a significant correlation with eating breakfast (r=0127, p=0.029). No correlation between religion course grades or attention in class and snack consumption was observed (p>0.05). There is a significant correlation between breakfast consumption and body mass index (p<0.001, CI:0.001- 0.010]. This study showed that consuming breakfast could have a positive impact on the marks of courses that need to be learned by heart, and in particular religion course marks. https://www.biotech-asia.org/vol12_nospl_edn1/association-between-eating-breakfast-and-theology-course-grades-of-high-school-students-in-tehran/ Breakfast; Snack; Religion course grade; Body mass index; Student