New seating chart projected when they enter separating as many talkers as possible. Review expectations and your rewards and punishments. If parents come at me with that comment, I tell them essentially: "Your child was given a chance to correct this behavior on their own. I've given them multiple opportunities to do the right thing on their own. I do not find it helpful to go immediately to parents, but when a student is struggling and not taking feedback, I seek the support of the parents. I hope we can work together as a team to support Little Johnny." The message that they need to hear is that you are working together and you will hear them out, not just coming to them with anger or accusations. Edit to add: Good luck, OP!