SAF Perfect Rise Instant Yeast-one pound bulk package
Use the best yeast that you can find.
SAF is considered the very best yeast for bread. You'll save a ton of money by buying by the pound. Each package will make about 120 loaves.
Once opened, divide your yeast into four zipper-type plastic bags and store in the freezer for up to one year. (The one you are using can be stored in the refrigerator.)