I got this GREAT comment on an earlier Bill Nye post.
Mr. Catania said... Hey! I use Bill Nye videos often when introducing a unit too. I found his great website that has most of the Bill Nye videos you can download in parts and it's not blocked by the county on my school computer. Here it is:http://www.gamequarium.org/cgi-bin/search/search.cgi
I have passed this on to ALL the teachers in my school and the science coordinator. Thank you Mr. Catania for sharing.