ALBERT LEA, Minn. – A substitute teacher, Gary Gottlieb, was placed on a do-not-call-back list after an allegation that he was peeping at “inappropriate pictures” on his cell phone in the classroom. A student had taken a video of an open text conversation with a picture showing a woman’s cleavage, said Superintendent Ron Wagner.  The superintendent wouldn’t describe how much cleavage was exposed except that it was inappropriate.