In a large glass or plastic bowl combine flour and sugar. Pour in warm milk and dissolved yeast mixture. Cover loosely and let stand at room temperature. Mixture will become bubbly. This is day 1 of the cycle.
Every day stir mixture with a wooden spoon.
On day 10 remove one cup of mixture and set aside for your bread recipe. Give one cup to friends with recipe for feeding and baking with starter. Begin the 10 day cycle over again with the remaining 1 cup starter. Be sure to let your friend know which day the starter is on so she can keep up the same schedule. You can freeze starter for later use, just let it thaw completely before using.