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A PowerPoint presentation isn't required for teaching the class. A new instructor wouldn't have the necessary, required information to create such a presentation until after they've taken the class... so I'm trying to figure out how he could have one and why DPS would ask to see it?

Agree... bring snacks and drinks, especially on range day; take notes; ask questions.
On the shooting qualification, it seemed several guys were only familiar with semi-autos and struggled with the revolver. We had more fail round 1 than I would've guessed. If you're in that camp you might want to get in a little practice with a revolver beforehand.
Good luck and have fun!