Nearly half of the nation’s elementary schools were open for full-time classroom learning as of last month, but the share of students learning in-person has varied greatly by region and by race, with most nonwhite students learning entirely online, according to results from a national survey conducted by the Biden administration.

For the White House, the survey results, released Wednesday, mark the starting line for President Joe Biden’s pledge to have most K-8 schools open full-time in his first 100 days in office. But they also show that he never had far to go to meet that goal.

Among schools that enroll fourth graders, 47% offered full-time classroom learning in February, while for schools that teach eighth graders, the figure was 46%. The data suggested that at least some students weren’t opting in.

In total, about 76% of elementary and middle schools were open for in-person or hybrid learning, according to the survey, while 24% offered remote learning only. The percentage of students spending at least some time in the classroom has likely increased since February, when coronavirus rates were just coming down from a national surge.

“The data collected by the survey are essential for beginning to measure and understand the pandemic’s impact on American students,” said Mark Schneider, director of the Institute of Education Sciences, the research arm of the U.S. Education Department.

The administration plans to update the initial data set each month to show how many U.S. schools are teaching in-person, online or through a combination. The federal government did not previously collect information on the topic, making it difficult to track progress on reopening schools.

The new findings are based on a survey of 3,500 public schools whose student bodies include fourth graders, along with 3,500 schools that serve eighth graders. A total of 44 states agreed to participate, while six states declined to take part. The survey asked schools about their teaching methods as of February but gathered other data as of January.

The survey casts new light on a period of particularly bitter debate in the school reopening process. In January, officials in California, Chicago and other locales were still locked in stalemate with teachers over reopening plans, with vaccines often arising as a sticking point.

Since January, however, the push to reopen has gained steam in many areas. The Centers for Disease Control and Prevention issued a roadmap to reopening in February, and this month the agency relaxed guidelines around social distancing in schools. Amid pressure from Biden, dozens of states are now focusing on giving COVID-19 vaccines to teachers and other school staff.

As more schools invite students back to the classroom, many parents are conflicted, according to a separate poll from The University of Chicago Harris School of Public Policy and The Associated Press-NORC Center for Public Affairs Research. It found that a majority of parents are at least somewhat concerned that in-person instruction will lead to more people being infected, but a slightly larger share are at least somewhat concerned that their children will face setbacks in school because of the coronavirus pandemic.

In addition to tracking school teaching methods, the new federal survey also tracks how many students have enrolled in each type of learning.

In January, the survey found, 38% of fourth graders enrolled in full-time, in-person learning, compared to 28% of eighth graders. Larger shares of students were entirely remote, with 43% of fourth graders and 48% of eighth graders learning away from school. It was not clear what share of students were learning online by choice and how many were in schools without in-person options.

There were stark differences based on where students live, reflecting the regional battles that have played out as cities debate how and when to reopen schools.

In the South and Midwest, where schools were the quickest to reopen, just under 40% of eighth grade students were enrolled full-time in classroom instruction in January. In the West and Northeast, by contrast, the figure was about 10%.

Across all regions, students in rural areas and towns were far more likely to be back in the classroom full-time compared to students in cities and suburbs.

In a further illustration of the pandemic’s uneven impact, the survey found striking differences based on students’ race. Among fourth graders, almost half of white students were learning fully in-person, with just over a quarter learning online. Among Black and Hispanic students, by contrast, nearly 60% were learning entirely remotely.

The difference was even wider among students of Asian descent, with 68% remote and just 15% attending fully in-person.

Similar disparities have been uncovered in many cities, raising alarms among education advocates who fear the pandemic is worsening racial inequities in education. The Biden administration has vowed to confront racial gaps in education and is urging schools to prioritize the issue as they spend more than $120 billion in recently approved relief aid.

As of January, the survey also found that students with disabilities and those who are learning English were not being brought back to the classroom at significantly higher rates than other students. Just 42% of those with disabilities and 34% learning English were enrolled in full-time classroom learning, compared to 38% of all students.

Even so, more than 40% of schools reported on the survey that they were giving priority to students with disabilities, who often have more difficulty with remote learning.

Among students learning online, the amount of time spent with a live teacher also varied greatly, the survey found. Roughly a third of schools offered more than five hours a day of live instruction, but another third offered two hours or less. Among schools serving eighth graders, 10% were offering no live instruction at all.

The survey does not include high schools, which weren’t included in Biden’s reopening promise and pose additional challenges as they work to reopen. Younger children are less likely to get seriously ill from the coronavirus, and education experts say they have the greatest need for in-person learning.

The Education Department said it will issue updated data from the survey each month through July. The information is published on a dashboard on the agency’s website.