A Chicago-based elementary school teacher mocked Charlie Kirk’s assassination by using a sickening gun gesture at a No Kings protest over the weekend.

Lucy Martinez, a teacher at Nathan Hale Elementary School, put a finger to her neck and pretended to pull a trigger when a man driving by in a pickup truck waved a flag calling the late podcaster a “hero,” video shows.

Multiple demonstrators flipped the bird at the counter-protester.

Kirk, 31, was killed when Tyler Robinson allegedly shot him in the neck while the Turning Point USA founder was speaking at Utah State University last month.

It’s unclear if Martinez was fired or faced any disciplinary action. The school’s website was taken down after the incident surfaced online.

Chicago Public Schools said it “remains committed to creating and maintaining a welcoming, safe and inclusive teaching and learning environment, free from harassment, bias, or harm of any kind.”

“While CPS does not comment on specific personnel matters the District follows a consistent process when allegations of misconduct are reported. Employees found to have violated Board policy are subject to disciplinary action.”

A spokesperson for the district referred The Post to the statement when asked if Martinez was fired.

Video of the horrifying gesture quickly went viral, leading to outrage.

“This is who we trust with our children & then wonder why they become radicalized as adults,” Libs of Chicago posted.

“This woman teaches children. Lucy is now the perfect face of the “No Kings” movement — a movement that preaches “love” but celebrates death. Evil always exposed itself,” Ryan Fournier, co-founder of Students for Trump, wrote on X.“What parent would want their child being taught by such a truly hateful person,” another user raged.

The Post was unable to get in touch with Martinez on Monday.