I am a teacher at Grace Church High School in Manhattan. Ten years ago, I changed careers when I discovered how rewarding it is to help young people explore the truth and beauty of mathematics. I love my work. As a teacher, my first obligation is to my students. But right now, my school is asking me to embrace “antiracism” training and pedagogy that I believe is deeply harmful to them and to any person who seeks to nurture the virtues of curiosity, empathy and understanding. “Antiracist” training sounds righteous, but it is the opposite of truth in advertising. It...