Creamy Scalloped Potatoes

10 lbs potatoes                                                1 ½ lb hamburger
6 to 8 cups white sauce                                   salt and pepper

Peel and slice potatoes.  Brown hamburger and drain.   Make white sauce and mix into hamburger.  Layer in 9 X 13 pans in layers of potatoes, hamburger and sauce) cheeses, and salt and pepper.   Cover with extra white sauce.  Bake covered at 350 for 30 min.  Uncover and cook for additional hour.