THE EFFECT BREAKFAST OF ENERGY INTAKE ON LEARNING CONCENTRATION LEVEL AMONG ISLAMIC BOARDING SCHOOL STUDENTS Laras Arrasyid 362015721179 ABSTRACK Background: Concentration was a critical element on learning process, and it is absolutely requires on learning. The factors that influence concentration of learning is hunger. These symptoms are usually experienced by students did not have breakfast before enter the class.Objective: This research was to analyze the effect of breakfast energy intake on learning concentration level among Islamic Boarding School students. Method: This study an observational study with a cross-sectional design. The research was conducted in Islamic Boarding schools Darussalam Gontor 2 for Girls in East Java , Mantingan, Indonesia. The research was conducted within three months, calculated December 26th, 2018 to February 28th, 2019. Result: The student’s intakes staple food (rice), vegetables and animal protein, vegetables, and snacks. They had seven days menu cycle. Their energy intake is 1194,9 kcal, 43% of respondent got enough calories and 57% had fewer calories. Level of concentration most responden 54,7 % had medium, 42,8 % had good and the rest was bad. There was significant correlation between breakfast and concentration p.value 0,04 < 0,05. Conclusion: There was the effect of breakfast energy intake on learning concentration level among students islamic boarding school. Keyword: adolescents, calorie of breakfast, concentration of learning