Try Jenny's method - I use it all the time and it's fool proof.
Fast and Easy Pinwheels!!! | Always Great, Always Free Quilting ...
Dec 21, 2011 ... Hi, it's Jenny, from the Missouri Star Quilt Company. We have another fun ... how we're going to make pinwheels fast and easy! You're just not ...
quiltingtutorials.com/all/fast-easy-pinwheels/