On the rare occasions that I use Powerpoint in the classroom, I generally have my computer set to mirror the display on the projection unit--so I see the same thing on my laptop as the students do on the wall screens.
Today, however, I was previewing some slides while my computer was hooked up to an external monitor, and I discovered an awesome feature of the current version of Powerpoint for the Mac. On my external monitor, I got the expected slide display. But on my laptop monitor, I got this nifty screen:
Very, very cool. I get a timer in the top left corner, the surrounding slides on the left so I can see where I am in the presentation, any notes associated with the slide at the bottom, an "up next" version of the slide so I'll know what happens if/when I click, and clearly visible arrows to click to move forward or backwards through the presentation. Color me impressed.