As you can see from the picture at the left, the core of the Bear Claw quilt block is a 9-patch. 

To make this block you start by determining the size of your patches.  Let's make them finish at 2 inches.  Make your half square triangles to finish at 2 inches, and cut your small corner square 2 inches square.  Cut the large square 4 1/2 inches.

Sew the half square triangles together in pairs, per the picture, and then attach one set of them to the large block.  Sew the small square to the end of the other unit of half square triangles, again per the picture,  and then attach it to the large block.

When I made the bear claw quilt below, I chose to make the center square a half square triangle, and I did not use sashing. I also put a little more personality in the quilt by using a plaid in the half square triangle.