Our Course Director will send you some helpful information once you sign up, but there are some things you can do now to prepare. First, review your Dive Theory. The Encyclopedia of Recreational Diving and PADI’s Dive Theory Online are both very helpful tools. Second, try to assist on at least one of each of the core PADI classes in the weeks leading up to your IDC. Third, practice the skill circuit. You’ll need to make sure these are up to demonstration quality for your IDC and IE.