Lean to Dive in 3 easy steps
We split The PADI Open Water Course into 3 easy steps:
Learn to Dive Step 1
5 theory sessions.
Each session involves instructor tuition, videos, quizzes. There is also a final exam.
This is usually combined with step 2, both steps combined usually take 2 days in total.
Learn to Dive Step 2
5 pool sessions.
Here you learn all the skills required to become a certified diver in the comfort and safety of a swimming pool environment. 
You must be able to swim 200m and tread water for 10 minutes.
This is usually combined with step 1, both steps combined usually take 2 days in total.
Learn to Dive Step 3
4 training dives off the coast of WA, or in the river dependent on weather, over 2 days.
Here you demonstrate all the skills you have learnt in the pool/classroom in the fantastic ocean. 
Upon successful completion of the 4 dives you are then certified as a PADI Open Water Diver!!!!
For more info click here