A leftist organization called “The Queer Mathematics Teacher” is seeking to embed gender theory in K-12 math classes.Brandie Waid, the director of The Queer Mathematics Teacher, laid out a plan for incorporating gender theory into math classes in a blog post on the Collaborative for Academic, Social, and Emotional Learning (CASEL) website. CASEL is sponsored by the Allstate Foundation.The Queer Mathematics Teacher is an educational consulting firm that seeks to promote “queer mathematics” in American K-12 classrooms. The firm sells a book titled “Talking about LGBTQ+ Identity,” which includes chapters titled “The Gender Unicorn,” “How Do I Talk About LGBTQ+...