PONCA CITY, Okla (KFOR) — Winter viruses are going around full-force in some Oklahoma communities. In Ponca City, two of its schools, Ponca City East Middle School and Ponca City High School moved to remote learning due to widespread illness. On Thursday, over a third of the high school's students were out sick. "This is a raging illness that is highly spreadable," said Superintendent Adam Leaming, Ponca City Public Schools. One parent says all three of her kids are home sick. "Fever, coughing, runny nose, sore throat... they're in bed, not getting up, I don't think one of mine hasn't eaten since yesterday," said Jessica Clement, parent. The school district said most parents are reporting the flu and Norovirus. Not only are students falling ill, but also teachers. PREVIOUS COVERAGE: Two Ponca City schools move to virtual learning on Friday due to “extreme number” of illnesses "We started out yesterday needing about 33 substitutes across the district and by lunchtime that had grown to 54," said Superintendent Leaming. The school district says while the middle and high school moved to online learning, the elementary school stayed open. "We did notice that a few elementary sites are actually doing really well attendance wise, so we didn't feel it was a community wide need at that point," said Superintendent Leaming. Superintendent Leaming says the district is working extensively to sanitize all the schools. "Lots of hand sanitizer and Clorox wipes that are going out across this district," said Superintendent Leaming. Some parents like Clement believe the rapid spread is because kids continue to go to school even when they are sick. "Parents send their kids to school sick because after three or four days you get a truancy letter," said Clement. Clement says she has received a truancy letter in the past and says it can be frightening for some. "Your kid hasn't been in school, if you don't continue to do this then you're going to talk to a police officer, you're going to go to the D.A., and parents are scared. I sent my son to school sick on Monday, I probably shouldn't have," said Clement. Superintendent Leaming says he understands the concern, as a parent himself. "We got to just work hand in hand and communicate with one another to make sure that there's no mistrust there or anything like that because at the end of the day, the best difference for these kids is to be in school if they can, but we don't want them there if they're sick," said Superintendent Leaming. The district is hopeful that the long weekend will help slow the spread, and will update parents if classes will resume in-person on Tuesday.