I reuse my practice sandwiches by adding new fabric top & bottom. It gets thicker but I can add clean fabric 2 or 3 times if I begin with thin batting. I use different color thread top & bottom so I can determine what I need to do differently to improve.
Different threads might be good idea in class....
Wish we could get class handout, webinar or something. Sounds like this will be a wonderful class.
[quote=BuzzinBumble] When I run out, I plan to get more at Goodwill. Now if I could just find something less expensive than using up all this batting...