Here is a link to my original "regular" granny square tutorial - ... And here is one showing the "join as you go" method for connecting granny squares - ...
by Sheruknittingcom
by Jayda InStitches
by Spoons & Hooks
by TheCrochetworld
by BAG-O-DAY CROCHET & MORE
by WoolyWondersCrochet
by Happy Crochet Club