KnitPro Chart Keeper Large Clay

These magnetic folios work like a tablet case--put your pattern inside, mark your spot with the magnets, and prop it up with the folded cover. When you're ready to head home from open stitching group, just put the cover right back over your pattern, and you'll know exactly where you are when you get home.  They also have a built-in zipper pouch (and an included pen) for notions.