MEXICO CITY — Skirt or pants? Children and teenagers in Mexico City’s public schools will be able to choose what to wear regardless of their gender. But the gender-neutral uniform policy in Mexico City’s basic education system comes with controversy. How hard will it be for the measure to promote tolerance and diversity? Classes are over in Mexico City on a warm afternoon. School buses depart, and parents pick up their kids. Among them is Lourdes Ríos, mother of two 13-year-old girls and students of a public junior high school. Ríos agrees with Mexico City’s new rule for public school uniforms, which allows students to wear skirts or pants regardless of their gender. As we chat, another mom joins our conversation. She’s Maricarmen Tapia, who at first said it would be weird for boys to wear a skirt, but later adds that men in Scotland and in ancient cultures used to wear them — so why not? “Pants would be great for teenage girls. Skirts make them an easy target for bullies” Tapia said. “When I was young, we had to wear white skirts, which was even worse, because when we were in our period, it wasn’t comfortable at all.”  “It’s time to take off the bandage from our ey...