I am using this tutorial from Lori Holt to make my blocks.
These make 12 inch squares. I have other tutorials on my pinterest board if you want to make different sizes, or just a granny square instead of a great granny square. The third row is what makes it a granny square, the middle is the baby, first row mommy, second row is granny and the third row is the great granny. I love that description from Lori!
First, always iron each piece as you sew when using your sewing machine, if you are hand piecing, do NOT iron as you go. Confusing, huh? The reason is because with machine piecing, you sew over the seams, with hand piecing, you sew up to the 1/4 inch seam, but not past it.
When you iron your rows, be sure to press the seams for the first row to the left, second row to the right, etc. The reason for this is so that when you sew your rows together, you match your seams kind of like a puzzle piece, see the picture below.
I don't normally pin, but I wanted to make sure my seams stayed perfectly matched, so I highly recommend it!
I had to trim my sides to even them up.
Is everything clear as mud? Be sure to read Lori's tutorial for the full instructions on making this block.