In research carried out by Hans-Werner Bierhoff they discovered that the most sociable children, the ones most friendly and attentive to others, not only were more popular with other children but these children did better at school.
One study showed those who helped others with their work attained better results themselves. These children who helped others were doing better two years later. The children who concentrated on their own work had not progressed in the same way.
This research showed that if you help others, it will help you as well. The research also had a finding that the helper children had better self esteem and a more positive image of school.