There are many books geared to parents of children who stutter. Sometimes I Just Stutter published by The Stuttering Foundation of America is written for the young! It covers many things that a young person wants to know about stuttering. It has letters from other young people who stutter and letters to give to teachers and relatives that tells them about stuttering and how they can help.
You can read it online here: http://www.stutteringhelp.org/Default.aspx?tabid=209