The purpose of this study is to develop a program which will improve young children` s basic social manners, their ability to control their emotion, their relationships with others, and their adaptation to their school life. For this purpose the research was performed in two parts. The first one was designed to find social characteristics which young children should know. As a result others, keeping social order, development of personal and national identity, clean habits, respect for cultural tradition, cooperative spirit, public morality, abstinence, reduced materialism, abuluty to make concessions, honesty, good manners, positive thinking respect for living things, trusting others, responsibility and diligence. These 18 social characteristics formed the contents of the Social Development Program. The second part was designed to find appropriate teaching strategies by which social characteristics can be taught. The main purpose of the study is to examine the effectiveness of the Social Development Program. Teaching strategies applieded were self-expression, discussion, problem solving, reasoning, modeling and explanation. For this research an experimental group was organized. The teacher of the experimental group tried to remind the young children from time to time through daily activities, of the importance of pro-social behaviors. The results Were as follows. 1. Children`s ability to control their emotion, to havegood relationships with peers and to adjust to school life were improved. It was proved that the level of children`s social values was higher than before. 2. The teacher who participated in the experiment found that she became more interested in teaching young children social values. She asked more socially-oriented questions to remind them of the 18 social characteristics than before. She used to ask more cognitively-oriented questions. 3. The Teacher came to believe that pro-social behavior could be cultivated only if the teacher intentionally set out to do it.