Preheat oven to 350°F.
Boil macaroni until tender.
Make a white sauce (or use jar kind) and add dry mustard and paprika. Thoroughly blend.
Add 4 oz. cheddar cheese to the white sauce and stir until melted.
Add Worcestershire sauce and blend.
Spray a 9×13-inch baking dish with cooking spray.
Layer noodles and sauce alternately for two layers.
Sprinkle with 1/4 C cheddar cheese and paprika.
Bake for 20-30 minutes or until lightly browned.