Place tea bags and baking soda in a large heatproof glass pitcher.
Bring water just to a rolling boil in a saucepan or kettle, and immediately pour over tea bags, making sure bags are submerged. Cover and steep 7 minutes. Remove tea bags without squeezing; discard tea bags.
Add ice, and stir until ice melts. Stir in Simple Syrup, and serve over ice.