Ever wonder where infants and children develop an understanding of the world around them? The knowledge that the infants and children gain about the world around them is called cognitive development. From the minute that a child enters this world from their mother’s womb they begin their life living in a profoundly social environment. It is not just social because of the people and other children that the child will interact with but also because of many relics that exist such as books, television, technology and much more. In this paper I will discuss social cognitive development, summarize the current knowledge that exist about it, analyze the applicability of my findings to the differentiation of instruction However on the other side and in contrast to Piagetian the difficulties are not lengthy for the children for many of the basic developments. For the so called non-knowledge states like pretense or desire, the basic forms of understanding develop even earlier, sometimes as early as the age of 2. This result is a valuable corrective to the earlier research done by Piagetian on social cognition. The earlier research had portrayed the preschool age children and period predominantly in off-putting terms. The recent research that has been done had documented a wide range of early appearing social-cognitive achievements as well as provided evidence of the effects of such developments, in that it exhibits steady relations between social-cognitive understanding and the quality of children’s social interactions (Astington, 2003). As in several areas of child psychology, people know more about what develops in social cognition then they know about how it develops. The theories correspond that both social experience and biological maturation of children play a part in their cognitive development. However all the theories disagree in the relative role rendered to the factors of exactly how they are posited to operate and in the form that the fundamental knowledge system is assumed to take (Doherty, 2006). The research that has