From guidelines issued by the publisher Steck-Vaughn to photographers providing images for their educational materials.

• People should “look normal.”
• Ethnic groups should be portrayed as attractive people.
• Asians should not be depicted as shorter than non-Asians.
• Contemporary, neat, clean, pressed clothing should be worn, but not their best clothes.
• All women should wear bras. No noticeable bulges below the waist on men.
• People should wear socks with pants or jeans. No bare feet.
• No drugs, cigarettes, pipes, cigars, or tobacco of any kind; no liquor, visible or in pockets.
• No excessive long hair on men. No big hair on women. No trendy haircuts; i.e., shaved heads, carved names or initials, high-top fades, dreadlocks, etc.
• No visible tattoos, scars, broken teaths, moles, disfigurements. However, a person with crutches or in a wheelchair is allowed.
• No hand-holding or other public displays of accection.
• No one should sit with his or her legs spread apart.
• No gum chewing.
• Not to trendy lifestyles; i.e., normal houses, do and cat, etc.
• No churches, adult theaters/bookstores, bars, liquor stores, etc., showing in background.
• Meals should be healthful.
• Dogs and cats should not be on furniture.

Quelle: Harper’s Magazine / May 2004