Before opening day, Department of Education and City Hall flacks assured The Post that the city didn’t face a driver shortage. Oops. Nor has the DOE rolled out its long-promised bus-tracking app.

“Parents are worried enough about the Delta variant; they shouldn’t have worry about where their children are” aboard a city school bus, says Manhattan Councilman Ben Kallos, who wrote the law mandating the GPS-tracking system. He also says the tech for the app is stuck sitting on a shelf at the DOE’s HQ.

Meanwhile, state Comptroller Tom DiNapoli says the mayor is leaving a ticking DOE fiscal time bomb for his successor: New initiatives launched with federal assistance will impose costs of $1 billion a year by 2025, as the grants run out.