I don't have a link to EB's 9 patch. It was on one of her shows on tv.
Cut two pieces of fabric the same size. They need to be square. Put them right sides together and sew one side. Then sew the opposite side. With the blocks sewn together cut the blocks in thirds. The center pieces that are not sewn may be larger than the two pieces that are sewn together. I just cut a little from those pieces so that they are the same size as the sewn pieces. You then sew one loose piece to each of the sewn pieces. The blocks will now have 3 strips sewn together. You put the two blocks right side together and sew them together again. You then cut into thirds again and sew the loose pieces to the sewn blocks.
You now have two completed 9 patch blocks.