Personal, social and emotional development (PSED) is recognized as one of the starting points for fulfillment in life. PSED is about the whole child, how they are developing now, what they can do to achieve their goals but also contribute to their community, and how children perceive their own identity and capabilities, understand their relationship with others in society and They understand their own and others' feelings. PSEDs are a part of children's development where they will be able to communicate effectively and develop positive behaviors towards each other and others. According to the Early Years Foundation Stage (EYFS), PSED is made up of three aspects which are self-confidence and self-awareness, managing feelings and behaviors and building relationships (DfE, 2012). In this essay I will discuss factors that influence children's behavior, theories of personal social development, and strategies for developing positive behaviors in children to promote PSED, transition, and inclusion. In general, there are many factors that influence children's behavior. One factor is health. Health is a general condition of a person's mind and body that determines the quality of life, so it will influence a child's behavior if not properly cared for. One of the daily necessities, food, can be negatively impacted by skipping meals, especially breakfast, which is essential to fuel the body to start the day. There are often reports from teachers that children who have skipped breakfast are less attentive and have discipline problems in class (Warilla Women's Refuge, 2013). Studies have shown that children who eat regularly on-time meals can absorb information better than those who do not (Johns, 2009). Another cause that has been around for a long time...... half of the paper ......p://www.optimus-education.com/how-support-personal-social-and-emotional-development- under-twos (Accessed: 9 January 2014). Susan, J. (n.d.) Can food influence children's behavior? Available at: http://www.motherinc.com.au/magazine/kids/kidshealth/433-can-food-affect-childrens-behaviour (Accessed: 2 January 2014).UNICEF (1989) United Nations Convention on the Rights of the Child. Available at: http://www.unicef.org/crc/files/ Rights_overview.pdf (Accessed: 10 January 2014). Vera, I. (n.d.) How to manage disruptive behavior in inclusive classrooms. Available at: https://www.teachervision.com/classroom-discipline/resource/2943.html (Accessed: 10 January 2014).British Psychological Society (BPS) (2013) Making music can improve young children's behaviour. Available at: http://www.alphagalileo.org/ViewItem.aspx?ItemId=134087&CultureCode=en (accessed: 17 January 2014).