Exasperated parents are ripping into the New York City public schools’ faulty new system that has been barring them from readily accessing their children’s grades or easily contacting teachers.

The Department of Education has been rolling out its own free grades, attendance and messaging applications, to replace banned third-party software that was involved in a data breach of more than 800,000 students last school year.

But families and teachers say the new system freezes or does not show data, and its features slow to roll out — leaving many without a sense of how their kids are faring in school.

“We’re having a lot of issues, parents having a lot of issues, schools having a lot of issues,” said Shirley Aubin, co-chair of the Chancellor’s Parent Advisory Council (CPAC), where families on Thursday blasted the new platform during a meeting with DOE Chancellor David Banks.

“The parent interface is not there — and to put it more bluntly, it should’ve been ready before the first day of school,” Aubin said.

More than 500 schools have signed on to using the DOE system this school year, officials said last week — many to replace the breached products from software company Illuminate Education, including Skedula and Pupil Path.

The department announced its software rollout last May, saying at the time in a news release that the applications would be available before the first day of the school year.

Banks conceded to the parent council on Thursday he had heard about issues with the new applications before.

“The system that we had before, the system itself worked fine enough, but the company that was responsible for it was in a position where people’s personal information was being co-opted,” Banks told the irate parents at the CPAC meeting.

“So we had to break ranks with them. We would have liked to have more time, more preparations so everything runs smoothly — but sometimes you’re thrown into a situation where you have to make a change.

“And there’s nothing we can do about it. We just have to figure it out as we go.”

But David Irons, a parent of five teenage foster and adopted children on Staten Island, said he can’t check if his kids regularly attend class or are passing their classes.

“The DOE has a $38-billion budget, and they can’t get this simple thing done,” said Irons, also a high school special education and English teacher on the same borough.

“The new system is all aspirational. None of it is ready to go.”

Irons told The Post that the old platforms used to have a messaging feature connecting teachers and parents.

Now, if involved families want to reach out to a teacher, they have to rely on the school or hope an online staff directory is updated. And if teachers want to reach out to families and let them know how their students are doing in school, they need to look up their contact information and hope its up-to-date — or find alternate messaging platforms.

“I feel like we have no connection with the parents now,” Irons said.

While hundreds of schools are using the applications, other principals have opted for pricier third-party technology in lieu of the city’s free system — even while three-fourths of schools face budget cuts this fall.

Arthur Goldstein, an English as a second language teacher at Francis Lewis High School in Queens, said his school bought third-party tech last week, more than a month into the school year.

Goldstein told The Post he didn’t give tests until last week because of the unworkable grading software, and found many of his students failed. 

“It’s my fault,” said Goldstein. “But it’s also the fault of this system that requires me to approach my work differently, because I’m waiting for something that works.”

After that, he asked his administrators for his students’ contact information, and got a wonky spreadsheet with some functional phone numbers — while others didn’t work and some were missing. He said he “absolutely” would’ve made those calls earlier, had he had a better way to call home.

“My classes are running much better since I made 20 or 30 phone calls.”

One high school parent at Susan Wagner on Staten Island told The Post she hasn’t been able to access the grades or attendance of her son, who had a 90-average pre-pandemic. Now, his grades have been slowly slipping, to 70s and 80s in recent school years.

Some class time has also been lost to teachers sitting down with students to manually show them their grades, a teacher at the school added.

“I’m afraid I missed something,” said the parent, “if I missed an alert I should’ve been able to see — to keep up with my son and his work. I’m afraid that he may fail something.”

The mom said she’s tried talking with her son, but wishes she had a better grasp of his progress to help guide him.

“He tells me he does the work, but I’m really not sure because he’s never working at home,” she added. “I hope I’m getting through to him — but I really don’t know.”

The DOE did not respond to numerous requests for comment.

Additional reporting by Susan Edelman