i know i am a few months late answering this, but it is artifcial turf, and it doesnt appear to be more seating, just new seating on both sides. They tore down the old stands replaced with new, Next time i go by there i can snap a pic.
Don't get me wrong, Newton is a beast of a football team and will win it all again this year, but just because they are ranked highher than a few 5A and 6A schools, doesn't mean they can beat them. Would definitely give them one heck of a fight though.