Some migrant kids were forced to show up to their Big Apple classrooms with limited supplies for the first day of school — because they couldn’t afford to pay for the hefty list of items, asylum-seeker parents told The Post Thursday.

Several parents at P.S. 143 Louis Armstrong in Queens said they only had enough cash to buy a “notebook and pencils” for their children, despite being given a list of roughly 14 items ahead of the new school year.

“They are very expensive, everything the school ask us to buy,” said a Mexican migrant mom, whose 6-year-old daughter started at the school. “It is true, I don’t have enough money to buy everything. I only buy what’s necessary – notebooks and pencils.”

“I don’t know if it will affect her learning if I don’t bring what they ask for. I’m worried about that,” she added. “I hope that the school provide some of the things they are asking for.”

A mom from Ecuador, Maria, said she, too, could only fork up enough money for pencils and a notebook for her 10-year-old son to start 5th grade.

Asked how many items she purchased from the supply list, the mother said: “A few.”

“I didn’t have enough money,” she said. “Only the notebook and pencils.”

Another parent, Maria Manzano, added that she couldn’t even begin to think about buying a uniform for her 6-year-old.

It comes after the nation’s largest school district gave a brief memo to educators on Wednesday instructing them on how to deal with the influx of some 21,000 migrants they will face.

The 2-page DOE letter, entitled “Guidance on Project Open Arms,” informed teachers that they were on their own when it comes to procuring supplies for migrants kids.

The missive advised school staff that the asylum-seeker students might not have school supplies, but offered no concrete way to procure them ahead of the first day.

“You would think that would be something that would be handed out centrally but something that the DOE and [Department of Social Services] doesn’t actually see [is needed],” City Councilmember Eric Denwirtz, a former special education teacher, said of the supplies.

“It’s unclear to me whether or not the DOE and DSS are properly prepared. So much always falls on the teachers and the council members,” he continued.

“The school system is more interested in looking like they are doing a good job than doing a good job. I think for a variety of reasons they are not doing a great job.”