I made 7 graduation quilts using the Villa Rosa pattern called Stars and Stripes this past year. It’s made with big blocks and HST’s. It goes together quickly and uses 8 fat quarters and 1 1/4 background, 1 yard border and extra for binding ( but I make my binding from leftovers). It looks great in any combination of colors....brights are great for teens as well as black and whites.

I'm making this one right now. In all assorted greens and I have 1.5 yards of black fabric with skulls all over it. I plan to somehow make into a backing size. Found a box of about a hundred+ 5 inch squares, so my triangles are only 4.5 inches. I'll need hundreds and I have maybe 4 greens in my stash. I started out using light, dark, light greens by the end it going to be all darks. Monday I'll be going to a destashing sale but I hear she mostly has florals.

The Take Five, Disappearing nine patch, and Warm wishes have enough interest and design that make a nice quilt. Fairly fast too, which to me is a bonus. I am thinking the fabrics that you have will determine the design you will make. Will it be twin sized?

Windham Fabrics has a freebie download on line by the name of Hugs and Kisses. It would work for a teen aged girl in the right colors.

Will check this one out.

Double Slice Layer Cake is a great pattern by Jenny Doan. Easy and quick, too.

Our teens really love French braid quilts

Fast and easy. Hmm. I like the Rail Fence. Warm Wishes goes pretty quickly. Chevron is all 1/2 square triangles and depends on the way they are turned so pretty quick, too. Be careful of fabrics/designs that are "too young" as these teens are not going to stay juveniles very long and hopefully will cherish the quilt in years to come.