edge down about a 1/4 inch and press.
now fold the fabric down again and make sure that your fold is slightly larger than your elastic. press and pin in place.
sew along the folded edge. i like to start in the back about 1 inch right of the center. sew all the way around and stop 2 inches from where you started leaving an opening to slide your elastic through.
attach the safety pin to one end of the elastic and push it all the way around the skirt back through the opening.
overlap the two ends of elastic about 1/2 an inch and sew them together.
close up the opening by sewing along 