In a small bowl, dissolve yeast in water. Let stand 10 minutes.
In a 2-quart glass, plastic or ceramic container, combine 1 cup flour and 1 cup sugar. Mix thoroughly with a whisk or fork. Slowly stir in 1 cup milk and dissolved yeast mixture.
Cover loosely and let stand at room temperature until bubbly. Consider this Day 1 of the 10-day cycle.