Okay, so let's break this down piece by piece. To be clear, my biggest concerns regarding sources are factuality and truthfulness as opposed to bias...BUT, the more extreme the bias (in either direction), the less factuality and truthfulness you'll generally find. mediabiasfactcheck.com is a fantastic resource to use when evaluating sources.
The Federalist article
The author says "Shrier [the speaker mentioned in the title] provided the stunning example of a kindergarten class in California where teachers inform their five and six-year-old students that their sex was randomly decided at birth and tell them it is now their mission to find what their gender is" but gives no citation or source. We're supposed to believe that because this person Shrier says it's happening that it must be so.
The Federalist is a questionable source, at best, known for publishing conspiracy theories and propaganda and is extremely biased. Please see:
https://mediabiasfactcheck.com/the-federalist/
The National Review article (linked through Yahoo)
The first red flag in this article is the use of scare quotes around social-emotional learning through an equity lens. Socio-emotional learning has always been part of school curriculums - it's why preschool and early elementary school are so important, as it teaches children about appropriate social behaviors and how to interact with each other and resolve conflicts in constructive ways. The second red flag is the involvement of Parents Defending Education , who aren't who they pretend to be and who attack anything that suggests that there are groups of people who get treated unfairly. They are a group of conservatives who are pushing the very same conspiracies about education that those who are against the "Don't Say Gay" bill are fighting against. This article about Parents Defending Education is commentary, but it includes links to back up it's claims:
https://www.wgbh.org/news/commentary/2021/06/04/right-wing-dark-money-targets-wellesley Then there's this:
https://www.mediamatters.org/critic...ight-wing-dark-money-and-critical-race-theory
This quote from the article is extremely problematic, too: "One parent raised a red flag about
When Aidan Became a Brother, a book being taught to fourth grade students that the parent described as “full on gender theory” which is teaching students that the sex you’re assigned at birth is 'wrong'." If you follow the links in the article deeply enough, you can see documents released by the school in question and that claim is false - no one is telling children that the sex they're assigned at birth is wrong. There are stories in which characters are born one sex, but feel like they're really another to illustrate that SOME people feel that way, and it's okay for them to feel that way and that people who feel that way shouldn't be treated unfairly, which definitely IS NOT "teaching students that the sex you're assigned at birth is wrong".
Further, the document that lists the stories in question includes summaries of the stories, as well as the learning goals of the lessons involved (all conveniently separated by grade) - note that NONE of the learning goals even come close to suggesting anything about children being LGBTQ+. The lesson goals are all about recognizing personal traits, what makes each of us ourselves, and treating people fairly. The two documents released by the school can be found here - they're in the middle of the article as downloadable PDFs:
https://defendinged.org/incidents/w...ansgender-content-introduced-in-kindergarten/
The National Review has a better reputation than The Federalist, but definitely targets the far-right (not extreme right) market. Their issues are that they make misleading claims and sometimes use poor sources - they scored the equivalent of a "C" in factuality.
https://mediabiasfactcheck.com/national-review/
The Discovery Institute
The Discovery Institute shouldn't be allowed to be associated with education AT ALL. They push pseudo-science and conspiracy theories and think evolution isn't real. (Not to mention the use of "discovery.org" in order to trick people into thinking they're the same as the Discovery channel or Discover Magazine - a common tactic used to misrepresent who they really are. Another important thing to be aware of is that ANYONE can purchase a .org domain.)
https://mediabiasfactcheck.com/discovery-institute/
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So let's look at these sources all together. It's important to note that they ALL are far-right/extreme right biased, and only ONE of them got even a mid-level grade on factuality...while the other two failed miserably. These sources are part of the effort to prevent teaching children that slavery happened, or that there are LGBTQ+ people in the world.
It's not really Gender Theory as a subject being taught in elementary schools...that's the false claim. What's being taught is merely that there exist people/children who may feel like they were born in the wrong body or who love people of the same sex, and that it's fine that they feel that way, and that how we treat people matters.