1- INTRODUCTION The growth and development of any society depends on its educational system. The school is one of the organizations which have a special sensitivity in all societies. This sensitivity is mostly due to the fact that its internal operations are exposed to public view and public judgment, so the course of change and social progress necessitates the need for education (1) According to the World Health Organization, one understands one's life situation according to culture and value systems and its relationship with goals, expectations, interests, standards and life experiences. Thus, the quality of life has a broad definition that affects a person's physical health, mental state, independence, social relationships and personal beliefs (2). The term quality of life is inherently ambiguous because it can refer to both one's personal experience of life and the living conditions in which one finds oneself. Therefore, the concept of quality of life is very subjective (3). The specific conditions of different environments can affect the people’s quality of life. School is one of the most important environments where the adolescent generation spends most of its time. Therefore, the quality of school life is one of the most important dimensions of quality of life, by which the students' education and life are seriously affected (4). Due to the importance of the quality of life of children and adolescents in school, the World Health Organization has recently raised the need for countries to improve school behavior and increase student health in the form of quality of life in school. One of the goals of the school health program presented by this organization is to create a healthy school environment in order to respect the dignity of students, their health and well-being, as well as to provide multiple opportunities to facilitate their success and progress (5). Quality of life in school is an important part of the overall quality of life of the students and arises from the interaction of students, family and school (6). Quality of school life is also a structure that is defined as the well-being and general satisfaction of students from positive and negative experiences that are rooted in in-school activities (7). These experiences constitute the general perception of the student of his / her level of well-being, well-being and overall satisfaction with life within the school and indicate the level of satisfaction with his / her daily life at school (8). One of the factors that play an important role in the daily life of students in general and in the quality of life in school in particular is academic procrastination. There are many types of procrastination, but the most common is academic procrastination. Academic procrastination is an irrational tendency to procrastinate in starting or completing a homework assignment that learners do not have enough motivation to do despite their intention to do academic work on time. As a result, they fail to complete the tasks within the desired and expected time frame (9). Studies indicate a high prevalence of procrastination in different groups, especially young people and adolescents. Procrastination with an estimated 91% has a high prevalence among different levels of education. In addition, some other studies have reported a prevalence of chronic procrastination up to 23%. Students, in terms of average education, also show significant procrastination, which accounts for one third of their daily activities, and it seems that these percentages are increasing day by day (10). The negative consequences of procrastination in educational settings are also reported in a range of low academic performance, lower grades and inactive participation in classes and discussions, low satisfaction with academic performance and failure, and even higher general anxiety. The tendency to postpone Mehrabi Far et al. Int J Pediatr, Vol.10, N.2, Serial No.98, Feb. 2022 15342 the assignments is not only negatively related to academic achievement but also negatively related to the quality of school life (11). Research shows that academic procrastination is to some extent mediated by the relationship between satisfaction with school life and school attachment (12). Other studies show that academic procrastination has a significant negative correlation with academic adjustment, quality of school life, and grade point average (13). Difficulty in emotional regulation is another issue that can affect the students’ quality of school life. One of the topics that have attracted a lot of experimental and theoretical efforts over the past two decades is the issue of emotions and the role that emotion and emotional regulation play in individual behaviors. Despite the positive and constructive role of emotions in students' lives, there is another dimension to emotions that is the destructive aspect of them. In fact, the emotions can become problematic and traumatic when they are expressed in the wrong style, occur in a disproportionate context, are very intense, and affect a person's life for a long time (14). Entering school has its own tensions; like failures, conflicts, pressures and changes. Some students experience psychological problems after entering school that affect their quality of school life and lead to some psychological disturbances. Familiarity with students' emotional regulation guides can reduce some of the anxiety, depression, and other emotional issues; Because it increases academic motivation and,