Many use PowerPoint for teacher and student presentations. With authorSTREAM you upload your presentation to the cloud where it can be shared vial email, or embedded into you web page or blog as seen below. I uploaded a presentation that include audio and video to see how well auhorSTREAM handled It is free! Of course they would like you to purchase various templates. worth looking into.
What I wanted to look at was how to Present Live. Click Here for Present Live!
Attendee sign-up required. Pro-Plan $2.95/month billed yearly.