Conservative radio host Glenn Beck on Monday linked an MSNBC promotional advertisement about public education to conspiracy theories that contend the United Nations plans to use mind control to establish a communist dictatorship and that the Obama administration is using school testing standards for "leftist indoctrination."

Last week, conservative websites like Newsbusters and the Daily Caller cited MSNBC host Melissa Harris-Perry's promo about the need for public education as evidence that liberals intended to usurp parental sovereignty.

"We have never invested as much in public education as we should have, because we’ve always had kind of a private notion of children," Harris-Perry says in the spot. "So part of it is, we have to break through our kind of private idea that kids belong to their parents, or kids belong to their families, and recognize that kids belong to whole communities. Once it’s everybody’s responsibility, and not just the household’s, then we start making better investments."

On Monday, The Daily Caller's Jim Treacher featured the video with the headline, "MSNBC’s Melissa Harris-Perry wants your children." And the Media Research Center's snarky headline borrowed a popular Internet meme: "Shorter Melissa Harris-Perry: All Your Kids Are Belong to Us."

Beck's The Blaze website noted that the conservative radio host had also featured Harris-Perry's promo on his Monday radio program, adding that he "referenced Agenda 21, which emphasizes 'the collective' over the individual, noting that it’s been branded a conspiracy theory among adults while children are learning about it in school."

Conservatives have warned that Agenda 21 was a "conspiracy to transform America from the land of the free, to the land of the collective" through "a mind-control technique" called the Delphi technique.

Beck also linked the MSNBC advertisement to Common Core, an initiative to create nationwide testing standards for students.

"This is, I believe, the fulfilment of a couple of things that we said would happen," Beck explained. "And they have. And they will be dismissed. And you will be made to look like a conspiracy theorist."

"This is the announcement of where they're headed," he insisted. "This is exactly what we warned about, this is the fulfilment of so many things that we have said on this program."

Beck went on to say that the "battle was on" to defeat Common Core because "it is a loss of parental sovereignty, of state sovereignty and it is also a loss of our children into a grotesque system."

Last month, Beck suggested that Common Core would help Chinese and Muslims take over the United States.

Watch this video from The Blaze, broadcast April 8, 2013.