AdvertisementSchools Face A Massive Challenge To Make Up For Learning Lost During The Pandemic06:00Download AudioResumeDecember 28, 2020Mary Louise KellyfacebookEmailThe first day back to school on Dec. 7 at Yung Wing School P.S. 124 in New York City. Students whose parents opted for blended learning returned to school after all were shut down a few weeks earlier. Millions of students are still going to school online. (Getty Images)