There are 3 sites that I know of on the internet that provide free strip pieced Tumbling Blocks instructions.
The first is called "Not your Grandmother's Tumbling Block". Marci Baker of Annie's Attic shows how she makes them in a video.
www.youtube.com/watch?v=DWpSETMbwsr
She explains it again in a Project Linus tutorial called "Big and Bold Blocks"
http://www.projectlinus.org/patterns...BoldBlocks.pdf
The 3rd site is from a BlogSpot called "Life in the Scrapatch" in a tutorial called "Easy Tumbling Blocks"
http://scrapatches.blogspot.ca/2012/...ial-part-1.htm
I didn't purchase a special quilting 60 degree ruler. I went to the dollar store and bought a 60 degree ruler in the school/office supply section.
I've made 2 Tumbling Blocks quilts using Marci Baker's method, and I enjoyed making both of them.