How to Pass the Instructor Exam (IE)
The IE dive theory exam tests the same topics as Divemaster, but at professional depth. Consistent, targeted practice is how candidates walk in confident.
What's on the exam
The Instructor Exam dive theory test covers five areas — physics, physiology, equipment, the RDP/eRDPml, and general skills and the dive environment — typically requiring 75% per section. As a future instructor, you'll need to not only get the right answer but understand it well enough to teach it.
The best candidates treat the whole IDC as exam preparation, drilling weak topics continuously rather than cramming at the end.
A study plan that actually works
Reading the manual cover to cover is the slowest way to prepare. The fastest is active recall: answer questions, see what you get wrong, and target those gaps. Here's the loop that works:
- Drill one topic at a time until you're consistently scoring above the pass mark on it.
- Take full, timed mock exams so exam day feels familiar, not stressful.
- Review every missed question — understanding why the right answer is right is what makes it stick.
- Practice in the language you think in, so you're testing your dive knowledge, not your translation.
Common mistakes to avoid
Even strong candidates slip on these:
- Assuming Divemaster-level theory is enough — the IE goes deeper.
- Neglecting the RDP/eRDPml, which stays a high-value, high-miss topic.
- Practicing in a second language when you could test in your first and remove that variable.
Ready to practice? Take unlimited Instructor practice exams with instant scoring and topic drills.