Children learn by example and from watching others. Children will learn what behaviour is acceptable and what is not. They will learn that anti-social behaviour like bullying or cheating, will lead to isolation and loss of friendship. Children will learn from each others reactions, such as when quarreling or fighting. The adult should always be observant in these situations, and be ready to step in, to point out unacceptable behaviour.
Adults are the main role models for children.
You should make sure always to set a good example, promoting good manners and acceptable behaviour. Always ask and never order a child to do something. Promote the use of please and thank-you. Listen to a childs requests and concerns and do not brush them aside because you are busy. Encourage children to respond to each others needs and requests.