The Ethiopian men, who ranged in age from 21 to 42, had been in this country several years. A couple were students, one was a former custodian who had moved from another state to be close to his college-bound son, and a fourth, Abdulhakim Tahiro, had been laid off from his job at an airport car rental kiosk.

“It’s good, for my level it’s good,” Mr. Tahiro said of the starting wages.

Mr. Tahiro and Ms. Done enrolled in the course that started last January, when about half of the class were immigrants. Another student in the course, Patricia Ramon, 56, was an entrepreneur in Mexico with sewing experience. Ms. Ramon already had a job as a sewer at J. W. Hulme, but quit to take the course with the goal of obtaining certification. She wanted proof, she said, that she had technical skills.

“I am not like an old-time seamstress,” Ms. Ramon said. She expects to sew as a career, and said that making $16 an hour with health insurance would be enough to live on.

The students who were not immigrants often had difficult work histories or other problems. One of them was Lawrence Corbesia, the man sitting at the back table during the screening session. He was a former machine operator and custodial worker who had been looking for work for three months.

Another was Edward Johnson, 44, who was homeless when the course started. After food service and call-center jobs, he went to prison for felony assault, and had a tough time finding a job when he got out in 2009. He moved to Wisconsin to pick fruit, moved back to Minneapolis because he hated picking fruit, and was living on the streets and selling watercolor paintings when a homeless-center counselor hooked him up with the sewing program.

Until now, the only sewing experience Mr. Johnson had was sewing on buttons — a punishment meted out by his mother when he misbehaved. To save money, Mr. Johnson walked the 45 minutes to and from the college.

The program was overwhelming at first, he said, “so frustrating that sometimes I’d go home crying.” But he spent days at the library, watching YouTube videos on sewing techniques and studying terms used by the industry. By the end, it had gotten easier, he said, making pajamas, tote bags and aprons.