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Free, World-Class Education To Anyone, Anywhere... ps and social networks? (Demographics. ... What are social groups and social networks? This is the currently selected item. Next lesson. Demographics. Top Voted. Relating social theories. Our mission is to provide free, world-class education to anyone, anywhere. Khan Academy is a - nonprofit organization. -volunteer today-. free, world-class education to anyone, anywhere... nonprofit organization-social groups and social networks-