Bring 4 cups of water to a boil. Remove from heat, and add tea bags. Let steep for 5-7 minutes, depending on how strong you like it.

Remove the tea bags, and stir in the sugar while the tea is still hot. This helps it dissolve completely and creates that smooth, balanced sweetness.

Pour the sweetened tea into a pitcher, and add 4 cups of cold water. Stir well and refrigerate until chilled.

Fill mason jars or glasses with ice. Pour in the tea, and add lemon slices for a bright, refreshing finish. Serve ice-cold with plenty of lemon.