When most charter school backers talk about improving government bureaucracies, they just mean a single bureaucracy. The founders of a new charter school are pledging to change two.

The Mott Haven Academy Charter School in the Bronx, set to open this August, will tackle the problems of not just the public schools, but also of the welfare system.

The idea is to pool two government services, already being paid for with taxpayer money, into one place — a $30 million facility in the South Bronx opening in two years, with one wing for teachers to teach school, and another for case workers to dole out extras such as tutoring, yoga classes, and lessons in personal responsibility. The result, the school’s founders say, could be to revolutionize the way the government tackles poverty, giving the public better results for the same buck.

“The city’s paying me to do this in Mott Haven, so what we’re going to do is, just do it much more efficiently,” William Baccaglini, the executive director of the child welfare agency sponsoring the school, the New York Foundling, said.

Two-thirds of the school’s seats will be reserved for children in the welfare system.

Mr. Baccaglini said the merging would help both schools and welfare workers.

“Kids come in hungry, kids come in with dirty uniforms on, kids come in late and sleepy — those kinds of issues can eat up your day,” Mott Haven’s founding principal, Jessica Nauiokas, a former teacher and assistant principal, said.

With caseworkers a phone call or walk down the hall away, Ms. Nauiokas said teachers would be freed to focus solely on academics.

Other public schools try to build support for students beyond school hours.

Charter school teachers often give students their cell phone numbers, and every day at the KIPP charter schools teachers are available through the evening as emergency contacts for students and parents. KIPP schools in New York even have social workers on staff, a spokesman for KIPP’s national organization, Stephen Mancini, said.

Mr. Baccaglini said even KIPP’s founder, David Levin, was “salivating” at the idea of having the full force of a child-welfare agency to lean on.

Mr. Levin did not return a call for comment yesterday.

Foundling officials said welfare workers would also benefit from the partnership with teachers.

Caseworkers at the Administration for Children’s Services drew criticism recently after the death of a 7-year-old Brooklyn girl under their watch, Nixzmary Brown, who had missed dozens of days of school. An investigation of ACS ordered by Mayor Bloomberg suggested strengthening communication between school and welfare officials.

“The bureaucracies are so big that by the time anybody ever physically gets to somebody’s house — clearly it could be a week or two. It could be two weeks later,” Mr. Baccaglini said, describing a hypothetical case of a child who was absent from school several days in a row. “And you know what? These kids, we can’t afford to do that with them.”

At Mott Haven, he said, a caseworker will be alerted every time a child misses school — and not just any caseworker, but the person who has been charged with following that student, and who has already been working with their family.

Relationships between caseworkers and their clients are not always perfect, but Ms. Nauiokas said she expects they would be strengthened at Mott Haven.

Rather than interacting only during home visits, caseworkers can also meet with parents and students at school — say, in the morning at drop-off time.

“There’s no reason why caseworkers can’t be congregating in the entryway and making informal contact with people — ‘Hey heard you had a job interview. Hope it went well,'” she said.

The building in Mott Haven, part of the nation’s poorest congressional district, is under construction. The school will be housed in a temporary facility until construction is completed.