I'm not one for specialist templates, but they had a big quilting day at Spotlight a little while back and demonstrated the Sew Easy Pinwheel Magic Template. It was funny, cause just that morning I'd been thinking I'd like to try this technique!!
So I bought the larger one (small is ok but extra sewing!) and decided to give it a try.
Once the blocks are cut out, you twist them around and end up with your pinwheel block as below.
Overall I was quite happy with it and plan to have a play with it again in the future.