Bearisgrey it is a very basic table runner . The bottom fabric is bigger then the top ( wider ) sew the side seams together , fold in half press. So part of the bottom fabric now becomes the top . Sew the ends and fold up to the top , they become points . She wants the trim for the top ends that you sewed and folded over .
I don't know how well you can see it but that is what my niece made for her first sewing :
http://www.quiltingboard.com/t-65504-1.htm