move from a system based upon sea time, and i'll go back to my algebra analogy. basically you pass algebra by sitting in class four or five days a week, an hour a day for a number of months. you should pass algebra when you know algebra. it might be nine months, it might be 15 months, and that's okay. but moving in sea time to competency, giving every child exactly what they need academically but also socially and emotionally and making sure they're fed. those are ideas that if we were to take them to scale, fareed, we could really accelerate learning, accelerate progress coming out of an extraordinarily dark time in our nation's history. >> arne duncan, pleasure to have you on, sir. >> thank you so much for the opportunity. next on "gps," will the world's cities be yet another victim of this pandemic? my next guest says nobody should be writing obituaries for our