Bring a large pot of water to a boil. 

Add 1 teaspoon of salt. 

Add 1 pound of green beans and cook for 3 minutes or until just tender. 

Using a slotted spoon, transfer the green beans to a large bowl with ice water. 

Let them cool for 4 minutes. 

Thoroughly drain the beans in a colander.

Repeat with remaining beans.

Put the beans into freezer bags and freeze. 

The beans will keep for at least 6-8 months.