Yes, washable school glue -- I like the clear glue if I can find it. I sometimes dilute it up to 50% (for all cotton) but I don't dilute it that much when I'm trying to baste non cotton fabrics. Poly seems to need full strength for holding power. I find that putting a little heat to the sandwich helps to set the glue. It seems to stick to both sides a little better after pressing with a little heat. Not too much on the poly though!
