[Based on this.]
Arizona school officials today held a news conference to explain their reaction to a student's sketch. The 13 year old student sketched what officials said was the likeness of a gun on the back of his homework. Officials stated the sketch was a threat and threats were punishable under school guidelines. They suspended the student for 5 days, later reducing the suspension to 3 days.
Sketch prompting punishment:
To help students better understand what sketching is allowed and what is punishable, School Officials released a set of sketches that would not be allowed due to their threatening content:
Implies lynching or hanging -- PUNISHABLE
Pencils, Crayons and sharpened Quills can be used as weapons -- PUNISHABLE
Thrown Object -- PUNISHABLE!
Threatening gesture with Spatula -- PUNISHABLE
At the news conference, the public sketched an explanation of the School Officials actions: