The criteria for exclusion? If "the topic is controversial among the adult population and might not be acceptable in a state-mandated testing situation; the topic has been overused in standardized tests or textbooks and is thus overly familiar and/or boring to students; the topic appears biased against (or toward) some group of people."
I have bolded the reasons that the sport of Ultrarunning will never be on a standardized test in the Big Apple:
Abuse (physical, sexual, emotional, or psychological), Alcohol (beer and liquor), tobacco, or drugs, Birthday celebrations (and birthdays), Bodily functions, Cancer (and other diseases), Catastrophes/disasters (tsunamis and hurricanes), Celebrities, Children dealing with serious issues, Cigarettes (and other smoking paraphernalia), Computers in the home (acceptable in a school or library setting), Crime, Death and disease, Divorce, Evolution, Expensive gifts, vacations, and prizes, Gambling involving money, Halloween, Homelessness, Homes with swimming pools, Hunting, Junk food, In-depth discussions of sports that require prior knowledge, Loss of employment, Nuclear weapons, Occult topics (i.e. fortune-telling), Parapsychology, Politics, Pornography, Poverty, Rap Music, Religion, Religious holidays and festivals (including but not limited to Christmas, Yom Kippur, and Ramadan), Rock-and-Roll music, Running away, Sex, Slavery, Terrorism, Television and video games (excessive use), Traumatic material (including material that may be particularly upsetting such as animal shelters), Vermin (rats and roaches), Violence, War and bloodshed, Weapons (guns, knives, etc.), Witchcraft, sorcery, etc.
You may have other triggers in your personal Ultra experience.