tutorial, starts with inch squares. so Easy. I have used this method many times. Starting with two 4 inch squares you end up with a 3 inch nine patch. Start with two 7 inch squares to end with a 6 inch nine patch.
Easy checkerboard quilt technique- Sew three alternating long strips of fabric together vertically, then cut horizontal strips. Reorder the strips to get the checker pattern. (Wish I would have seen this a couple of weeks ago when I did my last quilt.