N.Y.C. will eliminate remote learning for the fall, in a major step toward reopening.

Nonwhite families, whose health has suffered disproportionately from the virus, have been most likely to keep their children learning from home over the past year.

During the mayor’s news conference, the city’s schools chancellor, Meisha Porter, said there would be “no Covid-related accommodations,” signaling that teachers and school staff will no longer be granted medical waivers to work from home.

The city’s school system is currently planning for masks to be required in school buildings, Ms. Porter said. Schools would also follow the C.D.C.’s social-distancing protocol, which currently recommends elementary school students remain at least 3 feet apart in classrooms. Both those policies could change by the fall.

New York, like districts across the country, has struggled to make remote learning successful. Online classes have been frustrating for many students, and even disastrous for some, including children with disabilities.

By one estimate, three million students across the United States, roughly the school-age population of Florida, stopped going to classes, virtual or in person, after the pandemic began. A disproportionate number of those disengaged students are low-income Black, Latino and Native American children who have struggled to keep up in classrooms that are partly or fully remote.

Mr. de Blasio, who has been criticized for not doing more to improve the quality of online education, has said that remote learning is inherently inferior.

It has also been extraordinarily complex for the city to run two parallel school systems, one in person and one online, with many students switching between the two every few days. So many students and teachers operating from home made it nearly impossible for some schools to offer normal schedules.

For the past few months, Mr. de Blasio said he expected the city to keep some kind of remote learning option for the fall. But he and his aides changed their minds in recent weeks, officials said, as virus rates plummeted throughout the city and as children 12 and older became eligible for the Pfizer-BioNTech vaccine. Pfizer and BioNTech plan in September to submit requests for authorization of the vaccine in children ages 2 to 11.