Subjective well-being is a concept that has occupied the attention of many researchers in the last couple of years and it includes personal evaluation of particular areas of life, as well as satisfaction with life in general and the presence of positive emotions in contrast to negative ones. Those evaluations include two main components - the cognitive one and the affective one. The cognitive component refers to the evaluation of life satisfaction while affective one refers to positive and negative emotions. There are two main approaches in the context of well-being in general, hedonism and eudaemonism. Hedonistic approach includes the encouragement of pleasant emotions and avoidance of unpleasant ones, while eudaemonism emphasizes personal growth and development of each individual. Also, there are two main approaches that are used in measurement of subjective well-being – the objective one and the subjective one. Objective approach refers to the measurement of external conditions that affect the life satisfaction while subjective one refers to self-evaluation. Children spend most of their time in school, educational institution where the objectives of education are achieved in planned and systematic way. Its main objective should be encouraging well-being of every child. There is not a simple way to teach happiness to children, but there are more different factors affecting it. First of, it is necessary to encourage a child's self-esteem and self-confidence, as well as all stages of its development, such as emotional development, social development, physical development, and so on. Also, schools should help the child to build a positive self-image, they should listen to the child and his needs, show him that they care about him and that he is important to them. The cooperation with the family also has a positive impact on the child's well-being. All of this will certainly help the child's full development and will shape him in happy and satisfied individual.