STATEN ISLAND, N.Y. – Is Common Core making kids sick?

Some parents and educators in New York think so.

The symptoms of what they call “Common Core Syndrome” include headaches, upset stomach, irritability, frustration, confusion, crying and yelling.

MORE NEWS: Know These Before Moving From Cyprus To The UK

Heather Ann Pastore, a teacher in Castleton Corners in Staten Island, as well as several parents told SILive.com that the problems started when students began lessons centered on the new Common Core national learning standards, which require hours of after-school homework to prepare them for three days of state exams.

“Common Core Syndrome absolutely is 100 percent real. I see it every day in my students,” said Pastore, who is also a private tutor in language arts and math.

“Parents tell me their children are fatigued; they’re frustrated. They don’t understand the work because their teacher hasn’t taught it in class, or they didn’t get it before the teacher moved on, or they don’t understand the examples in their workbook,” she said. “And now the kids – and parents – are stressed out about the tests.”

The student experience with Common Core in New York could foreshadow what students in other states implementing the national standards can soon expect, as the Empire State was one of the first to make the transition.

Teachers and parents told SILive.com that student anxiety about Common Core is in part due to additional testing many believe is overwhelming students.

“What used to be a one-day, two-hour exam, is now broken down into 90 minutes a day over three days,” according to the news site. “And when students finish testing, they go back to their other classroom subjects, including science and social studies.”

MORE NEWS: How to prepare for face-to-face classes

“They’re expected to put in a full school day, but by the time they finish sitting for the exam, they’re already mentally and physically exhausted, especially the littlest ones,” Pastore said.

Desiree Hardison, mother of a fourth- and sixth-grader, told SILive.com her children have been frustrated with their Common Core assignments, and she plans to opt them out of their English Language Arts tests this week.

“These exams are bogus to begin with; where’s the ‘critical thinking’ involved in filling out little bubbles with a pencil. And then they’re judged on this?” she said.

The frustrations with Common Core and its associated student testing has prompted some state lawmakers in Albany to push for loosening the testing requirements, especially after last year results yielded a drastic drop in reading and math scores, the news site reports.

Politicians in other states are working to repeal Common Core altogether, following the lead of Indiana, which in March became the first state to dump the national standards