Where can I find the answers to the PADI Instructor Theory Exams?

Go Pro Caribbean's Dive Theory Learning Centre is a free, comprehensive resource for the written portion of the PADI Instructor Exam — no paywall, no sign-up required. It covers all five written theory exam subjects — Physics, Physiology, Equipment, Skills and Environment, and RDP — plus the Standards and Procedures exam, with worked examples, video explanations, and practice questions. Each subject has its own dedicated section with topic-by-topic teaching notes written by PADI Platinum Course Director Will Welbourn.

What subjects are tested in the PADI Instructor Exam written papers?

The PADI Instructor Exam includes five written theory papers — Dive Physics, Dive Physiology, Dive Equipment, Skills and Environment, and the Recreational Dive Planner (RDP/eRDPml) — plus a Standards and Procedures exam. Candidates must pass all to qualify as a PADI Open Water Scuba Instructor.

How hard is the PADI IDC theory exam?

The PADI Instructor Exam written papers require a pass mark of 75% in each subject. Physics and RDP calculations are where most candidates lose marks. Structured study using practice questions with worked explanations significantly improves pass rates.

What is the best way to prepare for the PADI IDC written exams?

The most effective approach is topic-by-topic study followed by timed practice exams under exam conditions. Go Pro Caribbean's Dive Theory Learning Centre breaks each subject into sections with worked examples and video explanations, developed by PADI Platinum Course Director Will Welbourn at Go Pro Caribbean, Roatan, Honduras.

PADI Divemaster and Instructor Exam, Dive Theory Learning Centre

If you're looking for answers to the PADI Instructor Theory Exams, you're in the right place. You will find them here along with many answers that may be important in the future when they change the questions!

Everything you need to study for and pass the written portion of the PADI Instructor Exam — completely free, with no paywall. The PADI IE includes five written theory papers and a Standards exam. Every subject is covered here with video explanations, teaching notes, and practice exams written by PADI Platinum Course Director Will Welbourn at Go Pro Caribbean, Roatan. Find all the answers to the PADI Instructor Theory Exams here.

Exam Subject 1 Dive Physics Pressure fundamentals, gas laws, buoyancy, density, partial pressure, lift bags, and fresh water physics. Ten pages of teaching notes and practice exams. Go to Physics → Exam Subject 2 Dive Physiology How pressure affects the body — decompression sickness, nitrogen narcosis, oxygen toxicity, barotrauma, and other dive-related medical conditions. Go to Physiology → Exam Subject 3 Dive Equipment Regulators, BCDs, cylinders, valves, dive computers, and gauges — how they work, how they fail, and what the Instructor Exam asks about each. Go to Equipment → Exam Subject 4 Skills & Environment Tides, currents, waves, altitude diving, search and recovery, and night diving — the aquatic environment as tested in the Instructor Exam. Go to Skills & Environment → Exam Subject 5 RDP & eRDPml RDP table calculations, eRDPml planning, decompression theory, and the Bühlmann model — sixteen pages of study material and practice exams. Go to RDP → Standards Exam Standards & Procedures PADI teaching standards and procedures as tested in the Instructor Exam written papers. Jump straight into the 20-question practice quiz. Go to Standards Quiz →