Ore. teacher challenging prohibition on guns 9/10/2007, 12:03 a.m. PDT The Associated Press MEDFORD, Ore. (AP) — A high school teacher in southern Oregon plans to challenge a school district policy that prevents her from carrying a gun on school grounds.Portland lawyer Jim Leuenberger said in an e-mail message to the Mail Tribune newspaper that he will ask a Jackson County judge to declare the Medford School District's policy "illegal and void" for holders of concealed handgun licenses."There is a state statute that prohibits local governments — including school boards — from restricting possession of firearms by...