Tamir Rice’s mother will have to bury her 12-year-old son. Do I have to tell my son to accept being treated as less than human to preserve his life?In my head, I have a list of things I want to teach my son, Gavin.Most things are common to one-year-olds: Gavin just discovered Elmo and, yesterday, learned to “clap clap” along with the letter of the day.