The nightlife of school buses is about to get more interesting.Zum, which provides student transportation including EV buses to 4,000 schools across the country, is partnering with the Oakland Unified School District to start selling power stored in EV batteries back to the California utility grid.Oakland is the first school district in the U.S. to go fully electric with its buses, 74 in all, and will now be the first to test the concept of V2G (vehicle to grid) bidirectional charging. In effect...