Andrea there are different ways people stack and whack..how I was taught was you will 'whack' however many fabrics you have. My stack was 6...then you line them up even 'stacked' and then you put your ruler and cut w/rotary wherever once...then take what would be on the right side, the top piece and put on the bottom of that right stack and continue until you have 6 different 'whacks' done...then sew them together..very simple and you will love it:))Skeat