Attention Deficit/Hyperactivity Disorder(ADHD)is the most common emotional, cognitive, and behavioral disorder. Mostly neglected, pre-activator-impulsive and combination type, including three types of ADHD, are considered DSM-IV criteria. The studying ADHD was conducted in elementary schools in District 4 of Tehran in year 2018. In this quasi-experimental study; we grouped 100 primery students into two groups in 2018. We collected the data by a researcher-made questionnaire including demographic(16) and knowledge(21) questions that used four-point Liker scales. The results of the research in the knowledge and performance of 5 girlish schools indicated that the average score of knowledge was 8.08±6.98(0-21), the performance score was 8.23±4.39(1-21). Knowledge and practice score of physical activity was3.4±2.74 and3.46±.01, respectively. Knowledge and practice score of food intake was 3.14±2.96 and 3.8±2.01, respectively. The results of the research in the Knowledge and Performance of 5 boys\\\\\\\' schools showed that the average score of knowledge was 4.96±6.91(0-21), the score of performance was 4.72±4.57(1-21), the score of knowledge and practice of physical activity were 2.82±2.5 and 3.8±2.01, respectively. Knowledge and practice score of food intake were 1.84±2.57 and 3.20±1.88 respectively. It is concluded that the use of exercise and diet food programing are recommended for the improvement of children with ADHD.

“Attention deficit/hyperactivity disorder (ADHD) ” “District ” “Elementary schools ” “Pre test/post test Tehran ”