That’s Mostly False.

In checking previous instances when DeSantis made this same claim, PolitiFact found no evidence that critical race theory, a broad set of ideas about racism being woven into American systems, was being taught in Florida’s K-12 schools in the first place. Educators, school officials and several Florida public school districts told us that CRT has never been part of the state curriculum.

PolitiFact found a few examples of state education officials objecting to textbooks and courses they said contained CRT teaching in recent years. They show the state’s objections to prospective teaching materials, and success in preventing content it deemed to be CRT-related. But questions remain about its rationale and broad definition of the theory and other prohibited topics.
-Aaron Sharockman, PolitiFact

Asked about how he would fix America's education system, DeSantis said "we need education, not indoctrination."

The governor defended keeping schools open during the COVID-19 pandemic and argued that the lockdowns were connected to students falling behind.

He also touted his response to the culture wars, saying Florida "eliminated" critical race theory and gender ideology in K-12 schools.

-ABC News' Hannah Demissie and Will McDuffie

On education, Ramaswamy says he would eliminate the Department of Education and make families more central to their children's educational choice. Central to Ramaswamy's campaign is that several federal agencies should be eliminated, but the idea of parental choice in education has swept through conservative states this year. Four Republican-led states passed new universal voucher programs that would allow parents to take tax dollars and spend them on private schools, including religious schools, or homeschool their children. More states have pushed for parental bills of rights that allow students' parents to have more of a say, and object to more, curricula.
-Analysis by Monica Potts of FiveThirtyEight

According to a Ipsos/Reuters poll from July, 77 percent of Republicans say that transgender athletes should not be able to participate in children’s sports at the elementary/high school level. Just 18 percent say they should, and 6 percent are not sure.
-Analysis by FiveThirtyEight

In the aftermath of a debate, it can be hard to figure out the actual impact of a viral moment or heated exchange. Here are some data-driven approaches that can help cut through the noise:

First, ignore “instant polls” that ask questions only among people who watched the debate. That group is not likely to represent the feelings of the broader population. Instead, look for post-debate polls — (like ours with Ipsos and the Washington Post) — that ask questions among the same group of Americans both pre- and post-debate.

Second, in the days following the debate, look at data that captures attention to candidates, such as trends in search results or media coverage, to determine which candidate made the biggest splash. Media attention is crucial for candidates who aren’t well known to gain traction in the polls and with donors.

Finally, look for changes in horse-race polls in the week or two after the debate. There is a lot of noise in primary polls (especially this time around) and it can take some time for changes in public opinion to be reflected in our polling average.

The big thing to remember is that what’s important to journalists and television pundits may not be what’s important to the public, and we have to wait for pollsters to ask them how they feel.

-Analysis by G. Elliott Morris of FiveThirtyEight