Are you taking the exam or course?
Usually, they give a familiarization time with course.
Main important thing is your ACTS and PROVE, say it to yourself out loud when you do it, it'll help you remember.
After pointing and keep pointing at safe direction and finger off trigger.
Proving a shotgun.
Pump Action
1. Behind the trigger is the safety button, make sure the safety is on by pushing the button to the right.
2. Pull slide down to reveal chamber, make sure it is clear. If you can't pull the slide down, look in front of the trigger guard, there is a hinge there that you can depress which allow the slide to be pulled down. You can retrieve the shotshell by either continuously cycle it until nothing come out.
or
3. While keeping barrel pointed at safe direction, flip shotgun upside down, see the loading gate in front of the trigger area? Insert two fingers into it and depress the loading gate down. To the left side wall in the loading gate, is another hinge that you can depress, that is what hold the shotshell in the tube. If there are shotshell in the tube, it will come out if you depress the hinge on the left side wall. It will come out one at a time, so keep on depressing the hinge on the left side wall until no shell come out, or nothing come out. That is how you check the tubular magazine for shotshell.
5. With slide down, loading chamber open and empty, and confirmed there is no shell in the loading gate, make sure the barrel is clear of obstruction.
You can also watch the video,
http://www.youtube.com/watch?v=sI949igE30s
Go to minute 6:07
Hinge shotgun,
While keeping finger off trigger and barrel pointed at safe direction, just break open the shotgun by pushing the hinge to the side (usually counter clockwise) and bend the barrel down. Look through the barrel, make sure it is clear.
Look at the video link.