A student at a Texas high school near Houston is being accused of taking an assignment on fake news too far by posting on social media an untrue story about an arrest of a school administrator. The post, which went viral, led school district officials to speak out against the story in a letter to parents. "This is a teachable moment for all of us, and it's a conversation we should all be having," according to the statement. "Families can use this to start the conversation about the power of social media -- and the damage fake news can create."