1. Bronfenbrenner's bio-ecological model views child development as influenced by multiple environmental systems, including the microsystem of immediate surroundings, mesosystem of connections between microsystems, exosystem of social settings not directly involving the child, and macrosystem of overarching cultural values. 
2. Important microsystems influencing cognitive development include family, school, peer groups, with parenting styles, school culture, and peer aggression impacting learning. 
3. Cooperative learning through collaboration and cooperation can positively impact students' social skills, engagement, and academic achievement when incorporating face-to-face interaction, interdependence, accountability, cooperative skills, and group processing.