In preschool and school institutions, there are more and more children getting diagnosed with ADHD. Attention Deficit Hyperactivity Disorder (Attention Deficit Hyperactivity Disorder) is one of the most common neurodevelopmental disorders of the 21st century. The exact cause of the disorder is not known, but it is considered that the symptoms that it causes are connected with brain chemical imbalance. Disorder is more common in boys than in girls. The behaviors of children diagnosed with ADHD are different and depend on the degree of the disorder is expressed on. However, all of them share a common problem of the inability to maintain attention, as well as impulsiveness and hyperactivity. Children with ADHD have hard time operating in preschool and school settings because they experience it as unmotivating, discouraging and unaccomodating to their needs. The vast majority of children with ADHD are very intelligent and imaginative, but the disorder prevents them from developing all their potentials.Unfortunately, often social environment precieves children diagnosed with ADHD as misbeahed, reckless and as if they had not reached the level of education as their peers seem to had done. Therefore, these children need help and support of adults (parents, educators, teachers, the social environment they live in etc.) Moreover, the sooner the diagnosis is determined and the sooner the child diagnosed with ADHD is refered to proper therapy, the sooner the everyday life of these kids is going to become much more improved in its quality. Of course, therapies that are being conducted are individually designed for each child.