Why does the jigsaw classroom yield such positive results with regard to self-esteem, achievement, and positive informal contact between children of various racial and ethnic groups?

The jigsaw classroom yields such positive results with regard to self-esteem, achievement, and positive informal contact between children of various racial and ethnic groups because it reduces racial misunderstanding, significantly increases meaningful educational outcomes, and raises each participating child's interest in cooperating and working together with other children in order to develop and achieve positive results.