Last Saturday I had to present at a regional science teacher's conference. It was the first time presenting for me, and besides being extremely nervous and having one of the wife's cats throw up on part of my presentation, everything went Ok.
I decided I would do a presentation on how to make a hovercraft. Riding around on the hovercraft, and experiencing Newton's laws firsthand, is something the kids at my school ask to do all the time.
I built a new one, taking pictures of every step along the way and I created a Powerpoint presentation on how to do it. Many of the teachers present looked at me like I was crazy when I tried to get them to ride it, but a few were brave, I gave away all my CDs with my presentation on it, and I have to email it to a few more people.
I did have one weird moment. It reminded me of when I was a first year teacher and I looked around at my classroom and realized I was the adult in the room. Presenting for the first time is very much like that.
I've posted the presentation on one of the free file hosting sites. I don't know if this will actually work or not, but if you'd like to see it you can view it here
Monday, February 20, 2006
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Cute. I see the Mark 1 didn't have foam insulation/bumper around the circumfrence and you appear to have used clear, plastic sheeting for the skirt. Obviously, that arrangement didn't work out.
You might want to look into woven poly-tarps. They're both cheaper and more durable then a vinyl shower curtain. Only thing about them is they tend to unravel from the cut edge without something to stop the unravelling. Probably the duct tape would do.
What's the pickle jar lid in the center of the bottom for?
Actually the Mark 1 used a clear vinyl shower curtain. The foam bumper around the edge is courtesy of "Mythbusters" and a good idea to protect the furniture.
The pickle jar at the bottom helps maintain the pressure within the skirt. Without it most of the air pressure would be consumed with just filling up the skirt itself with air.
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