This is probably telling my age, but my grandmothers and mother used feed sacks to make quilts which kept us warm on many a cold winters night. (We certainly had never heard of central heat) Many times the back was from white flour sacks. When the feed store delivered our chicken feed, we got three sacks at once and the delivery guy was very patient to match those sacks. As I remember, my mother was very happy when she could purchase heavy double blankets for our beds, and I NEVER again saw her working on a quilt.
I have learned a lot about quilting from other quilters and have watched EVERY quilting show on TV. Also, Simply quilts has most of their shows on line and the directions can be printed out.