I have also had some problems with the IF-AT sheets, but discovered something that has been helpful. Most of my sheets have been taken out of the plastic and stored in a manila envelope. The sheet that has been on top is almost always impossible for scratch off. When I pull the sheets from the middle of the stack, they scratch off with little to no problems. I think that as the sheets age, they dry out and then the problems with scratching off to reveal answers occurs. I am more careful to keep the sheets stored in their plastic wrap where they are less likely to dry out. Staci Johnson Southern Wesleyan University