Education policy is largely controlled by state and local officials, so Mr. Trump does not have authority over whether systems reopen. He and his aides also did not offer concrete proposals or new financial assistance.
The details of reopening will vary widely between districts depending on the virus’ spread, which is why a return to school may look very different in New York, where transmission is currently low, than in Phoenix, where cases are increasing.
In New York, Gov. Andrew M. Cuomo has authority over when schools across the state, including in New York City, can reopen. Mr. Cuomo and Mr. de Blasio have long feuded over schools, and Mr. Cuomo could still halt the mayor’s timeline for reopening.
Under Mr. de Blasio’s plan, school principals will spend July determining which of three staggered schedule options to adopt. That decision will depend on how many students and staff can fit into school buildings while social distancing, and on how many families want their children to return to school in the first place.
School leaders will let parents know in August which days children can report to school, and which days they will learn remotely.
The city’s models are based on current federal guidelines that recommend six feet of distance between students. If that recommendation becomes less restrictive over the summer, it is possible that city students could physically attend school more frequently.
Officials in Massachusetts, for example, have already said schools could reopen there with at least three feet of distance between children.