AURORA, Colo. – A Colorado preschool blocked a girl from eating part of her lunch after a teacher deemed it “unhealthy.”

Leeza Pearson says she packed her daughter, a student at Children’s Academy, a ham and cheese sandwich, string cheese and a four-pack of Oreos last Friday.

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When her child returned home, the cookies were still in the lunchbox, and were accompanied by a note from the school:

“Dear Parents, it is very important that all students have a nutritious lunch. This is a public school setting and all children are required to have a fruit, a vegetable and a heavy snack from home, along with a milk. If they have potatoes, the child will also need bread to go along with it. Lunchables, chips, fruit snacks, and peanut butter are not considered to be a healthy snack. This is a very important part of our program and we need everyone’s participation.”

Pearson’s daughter says her teacher didn’t allow her to eat the cookies during lunch, because “they don’t have enough nutritional value,” according to 9 News.

The school plead ignorance about the note, saying it should not have gone out to any parent. They say it is not school policy to tell children what they can or can’t eat for lunch.

“What the school thinks is healthy for her is not what I think is healthy for her,” the mother says. “That’s between me and her and our doctor – not the school.”

It’s not the first time Oreos have been treated like contraband.

Last month, a science class was learning about the Earth’s tectonic plates using Oreos.

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A permission slip was sent home to Pennsylvania parents, requiring approval to allow their child to eat the cookie at the conclusion of the lesson.

“The students may eat the Oreo after the investigation if this is okay with you,” science teacher Darlene Porter’s note to parents of Welsh Valley Middle School students read, the Daily Mail reports.

“The students do NOT have to eat the Oreo if they do not wish to do so.”

It also isn’t the first time a school has tried to regulate a home-packed lunch.

The Richmond, Virginia school district issued a notice to parents telling them home-packed lunches were permissible with a doctor’s note.

“Parents are to be informed that students can only bring lunches from home if there is a medical condition meriting a specific diet, along with a physicians note to that regard,” it read.