BEAUMONT, Texas --A high school math teacher is facing an assault charge after video surfaced of her hitting a student at least five times in class. CBS affiliate KFDM reported Mary A. Hastings, a 63-year-old geometry teacher at Ozen High School, was arrested and has been placed on paid leave. The cell phone video, recorded by a classmate, shows Hastings swiping papers off the student's desk then slapping him five times. Hastings, who appears exasperated, scolds the student for being a disruption. She hit the student while saying, "...because you're stopping him from graduating you idiot [expletive]."