A few educational Powerpoints I've worked up, to be added to presentations:
Mercury. An animation of the reflections, for the Rotation of Mercury lab
Proper Motions. A single slide demonstrating (in 3D) how we detect proper motion versus radial velocity, or just RA and DEC.
Animated Doughnut model. An attempt at animating the ubiquitous 'exploding doughnut' diagram that shows up in every presentation about Active Galactic Nuclei. Also includes an explanation for the illusion of faster-than-light AGN jets.
Spectroscopy. Animated slides for use in presentations about spectroscopy and Kirchoff's gas laws. Probably best chopped up and mixed in with other presentation materials. Not really done yet.
Parallax. An attempt at a 'parallax scroller' (used into my Fall 2007 Seminar Presentation to explain relative motion of stars) and then an explanation of astronomical parallax and what sattelites like Hipparcos measure.
Star Life. An attempt at doing an entire stellar evolution sequence in Powerpoint. Does not really work.
The Universe. Five slides about how our view of the universe has changed- from early times to 1930. Unfinished.
230 Light Years Towards Orion. An XviD-format capture of constellation distortion as you fly through space. I used Celestia 1.5 by Chris Laurel for this.
Europa (and Io) Orbit. For the 'Moons of Jupiter' lab.
The Doppler Effect. Both sound and light effects.
Triton. An even older presentation I did on Neptune's Moon, Triton (Fall 2005).