Graphic pornography is readily accessible during the school day in one Colorado middle school district — and parents across the country are furious.

Children attending middle schools in the Cherry Creek School District in the suburbs of Denver, Colorado, can now — with educators’ blessings — view hardcore sexual and homosexual pornography and other “educational” material that is attempting to lure them into becoming sexually active.

“This hardcore pornography is the worst we’ve seen in over 20 years of dealing with the sexuality agenda in schools.”

Included are descriptions of sex toys and activities so graphic we cannot reproduce them here.

But some include “Ideas for Erotic Sex,” “Graphic homosexual short stories,” and “BDSM — Bondage and sexual sadomasochism,” according to Massresistance.com, a Massachusetts pro-family organization that is helping angry Colorado parents fight back.

Related: Evil in the Classroom: Sex Education for Kids

This all came to light when the parents of a middle school student in the district came across the distressing material.

“This hardcore pornography is the worst that we’ve ever seen in over 20 years of dealing with the sexuality agenda in schools,” Brian Camenker, founder of Mass Resistance, told LifeZette. “And it’s being made available to seventh-graders. But the real horror is the inhuman mentality of the school officials who have defended it and refused to remove it.”

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Some of the material includes, “How to Have Oral Sex,” “How to Have Anal Sex,” and “How to Have Vaginal Sex.”

Camenker was able to independently access the graphic material that is made available to kids as young as 11. One Massachusetts mother of two middle-school-age children was horrified — and moved to angry tears after seeing the material.

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“I sat and cried when I saw the material available to children through the Mass Resistance website. It is so evil to put that in the minds of children just developing a sense of themselves,” she told LifeZette. “I am demanding that our own [Boston-area] schools keep us informed of all sex education content.”

It’s not enough that this material exists — the school district is hiding it from parents. The children are given access to the disgusting material through special web portals set up by the middle schools themselves. “These ostensibly include regular library material and legitimate health knowledge, science, and similar topics,” notes Massresistance.com. “However, children are given one password, and their parents are given a different password. The material is omitted from the parents’ accounts and is only available through the children’s accounts.”

Related: The Risky Sex Teens Learn from Porn

The school is getting the pornographic material through a company in Massachusetts. The company does not deny supplying the material to schoolchildren, reported Mass Resistance. Their middle school offerings also contain left-wing political articles.

The school has no problem with this offensive material presented to its young students — but instead turned on the angry parents.

“As more Colorado parents are hearing about this, they are really getting angry.”

“When the parents presented samples of the pornography and other explicit sexual material found on the students’ portal to school officials and board members (through email exchanges and at meetings), the officials did not deny that that it is being made available to the middle school students,” according to Massresistance.com. “They simply do not see a problem with it. And they said that the parents were ‘breaking school policy’ by using the students’ password instead of the parents’ password.”

This school-sponsored depravity has got to stop immediately. Children should not be subjected to this type of material behind their parents’ backs, any more than they should be handed porn magazines. That the wretched material comes courtesy of a defiant, progressive school system is even worse.

Camenker remains committed to wiping this harmful material off the screens of these Colorado middle school computers.

“The battle is just heating up,” he told LifeZette. “As more Colorado parents are hearing about this, they are really getting angry.”