Yeah! You are right. Maybe your teacher told you to make a cheat card for the purpose of making you study! Hahaha!! Of course, when you make your cheat card on a small piece of paper, it's the same thing as studying! Your teacher is smart. True. But, knowing the forumula is not enough. It's important to understand the whole concept. Without the that, the formula will be meaningless. It's like messing with the registry. You may have a complete list of all registry tweaks, but if you don't understand the concept or how the registry works, you'll still have problems in the near future. B)