Home Brewed Iced Tea
Source: Tea Association of the United States

Bring fresh cold tap water to a full, rolling boil. Use one teaspoonful of loose tea or one tea bag per cup (five to eight ounces) of water. Pour the boiling water over the tea. Brew three to five minutes. If you prefer your tea less strong, add more water after the brewing period. Pour over ice.

For large quantities prepare a concentrate as follows:
Bring one quart of cold water to a rolling boil. Remove from heat and add 8-10 tea bags per quart of brewed tea desired. Steep 3-5 minutes and pour over remaining cold water or ice cubes to prepare quantity desired. To serve, pour into tall glass filled with ice, garnish and sweeten as desired. (Note, this recipe uses fifty-percent more tea than used to make hot tea to allow for dilution by ice.)