Emily has been piecing each block by hand, using a method of making templates out of freezer paper.  First Emily traces the block onto the freezer paper, numbering each piece according to which fabric it is and in the order she will be putting it together.  Then she cuts the pieces  apart and presses them with a hot dry iron onto  the wrong side of her fabric and carefully traces around each piece.  Then she cuts the pieces from the fabric with a 1/4" seam allowance.  She hand pieces her  blocks in the way that Molly explaines in her tutorial on hand piecing.