Supporters and opponents of charter schools are clashing again, this time over a television advertisement some are calling racially charged. NY1's Lindsey Christ filed the following report.

On the steps of the Department of Education Tuesday, elected officials and parent advocates rallied against a television advertisement that they call racist.

The ad takes a look at two children, one white and one black.

"Because he lives in a wealthy neighborhood, this 6-year-old will attend a good school. Because he lives in a poor neighborhood, this 6-year old will be forced into a failing school. So he'll likely go on to college, but he'll likely never make it there," the ad says.

The ad, which began airing last Friday, is sponsored by a charter advocacy group called Families for Excellent Schools. It blasts  Mayor Bill de Blasio - in the past, an opponent of charters - for "forcing kids into failing schools."

"I think the ad is demoralizing," said City Councilman Andy King of the Bronx. "I think it's discriminatory. I think it's prejudiced, and it sets us back 40 to 50 years when it comes to race relations in our school system."

"It's immoral, it's reprehensible, and that they should pull it," said another person at the protest.

The pro-charter group says the ad highlights an uncomfortable truth: the pubilc system is divided between high-performing schools and low-performing schools, and black and Hispanic students are much more likely to attend the low-performing schools.

Activists at the rally, however, say that if a young black student watches the ad, it could crush his self-esteem.

"To turn on the television and see an ad that blatantly tells them that, 'You're black. You live in a low-income neighborhood. You will not go to college,' especially for our males, is dangerous," said Natasha Capers of the Coalition of Educational Justice.

Advocates rolled out the ad in advance of a major rally of charter school supporters that was planned for Wednesday. Organizers predicted 15,000 people would march across the Brooklyn Bridge. However, with stormy weather forecast, the rally was postponed Tuesday evening.

Potential mayoral candidate Eva Moskowitz is the driving force behind the rally, which has been rescheduled for October 7. She plans to close all 34 of her Success Academy schools so that the 11,000 students and their parents can attend whenever it is held.