This is from the website http://crockpot365.blogspot.com/
1 lb. dried great northern beans
Pour the entire bag of dried beans into a colander and rinse under cold water. If you see any beans that have broken in half, or skin that floats to the surface, get rid of it. Dump all the beans into your crockpot. Add enough water to cover all the beans and an additional 2 inches.
Cover. Do not turn on. Let the beans soak for at least 6 hours, or overnight. If you live in a very warm area, and the crockpot won't be in a room that is climate-controlled, put the stoneware in the fridge. You don't want bacteria to have the opportunity to grow.
In the morning, dump the water, and rinse your beans. The water will be bean-colored.
Put the beans back into your crockpot and cover with enough fresh water to completely cover the beans with an extra 2-3 inches.
Cover and cook on low for 8 hours.
The beans are done when they are bite-tender. Don't worry if the water hasn't all absorbed.
Drain the beans.
Freeze in seperate containers or use as you would in recipes calling for canned great northern beans.