I always wait until the Interfacing and Batting go on sale for 50% off. Then I get to use my teacher 15% discount on top of that! Just bought 3 packages of the fusible interfacing last week when it was 50% off. It's normally $3.25/yard. With the 50% off sale, it was down to $1.63/yard. My teacher discount brought it down to $1.38/yard. I can't use my teacher discount along with a 50% coupon, but if the item is already on sale for 50% off, I can knock off an additional 15%! Since I make a lot of t-shirt quilts, that's a HUGE savings in my pocket.