The Cobb County school board approved an $8.6 million contract for additions and modifications to Simpson Middle in Marietta. Nix-Fowler Constructors, Inc. was selected to perform the work, which is schedule to be completed by July 23, 2012. Additions include a new science and music classrooms. Renovations include an expanded cafeteria to serve all grades. Currently, meals are prepared at a central kitchen and then served at three separate cafeterias located in each grade-level wing. The heating and air system will also be replaced.