Nine Patch Uneven Nine Patch
The Uneven Nine Patch style of quilt block is so named because not all of the nine individual patches are the same size as is the case in a regular nine patch quilt block. This style of quilt block is often used in 10" quilt block to make the math easier, but you will find this construction method in many other quilt blocks as well.

Halley's Comet

Free Quilt Block Pattern

The Halley's Comet quilt block could be selected as a "study in half square triangles" -- at least in my mind. I'm always thinking as a teacher of quiltmaking, and so I like to instruct with blocks that are not the most commonly used. This cute pinwheel block is a fun one to make.

This five patch block is easy to construct, once you have sewn your half square triangle patches. I like to stitch blocks like this as an uneven nine patch, rather than sewing in five rows of five. I think it makes it easier to sew in what I call "chunks" instead of row by row -- but that is just me, so please use your preferred method and enjoy this striking quilt block.