Are there any good DVD's you can recomend that teach basic takedown's, the guard, some simple subs, etc.?
what do you wantt o teach? if its MMA you should start with Judo or BJJ, you can have a look at these websites. http://www.judoinfo.com/techjudo.htm and http://www.ultimatejujitsu.com/learn-jujitsu-techniques/brazilian-jiu-jitsu-techniques.shtml
before you start anything learn how to fall, put ushiro ukemi and yoko ukemi into youtube or else its going to be a long long day.
Yes, please learn how to fall. It's painful just to watch people try to break their fall by reaching for the floor =/.
