1/4 cup flour 
 1 teaspoon salt 
 1/4 teaspoon pepper  
2 tablespoons minced onions 
 1/2 teaspoon paprika 
 3 cups milk 
 1 cup of grated cheddar cheese(or your favourite kind of cheese) 
 2 cups uncooked elbow macaroni
Spray crockpot with non-stick spray for easy cleaning. 
In a saucepan, combine first 6 ingredients. 
Pour in milk and stir with a whisk until no lumps remain. 
Heat and continue stirring until mixture boils and is thickened. 
Add cheese and then macaroni. 
Stir until well mixed. 
Pour into 3 1/2 quart slow cooker. 
Cover and cook on low for 2-2 1/2 hours or on high for 1 hour.