The mother of a 7-year-old Irving elementary school student says her son wet his pants in class after his teacher refused to let him use the restroom ... Cross' son, an honor roll student, needed to go to the bathroom, but he sat back down because he didn’t have any Boyd Bucks, his mother said. "He tried to hold it as much as he could, but he just couldn’t," Cross said. "He came home from school, and he was crying and really upset." "Really, that's just unhealthy," Cross said. "I think that she had no concern for the children." Cross...