But social world doesn't need classroom-knowledge.Social world needs just two minds(thought about self for other AND thought about self for self). So be social at first by inculcating two(self for other and self for self) minds on every point UPTO 5 YRS AGE. Then be professional in your subject of interest "by mind discipline" at every next.

Professional(department/corporate/association/union/group/party) world needs classroom-knowledge.