Mine is very simple.
I put a pot of water, 6-7 cups on the stove. I add 3 large tea bags, bring just to a boil, then turn it off. Let it steep for a few (5?) minutes. Pour the hot tea in a gallon pitcher. Add just over a cup of sugar (more or less to taste) stir to disolve. Fill with cold tap water and put in fridge to chill.