lerdalt,
At a college or community college
Depends on the College and whether the classes "transfer" to a 4 year college. Most AS classes are "technical" classes ment for a 2 year degree only and do not transfer, unlike AA classes that are ment to transfer.
Several years ago many colleges in Florida setup programs so that the AS classes transfered to 4 year programs, now these classes have to be taught by an instructor with a Masters or PhD in that area (at least 18 grad hours in that area). They could have a "teacher of record" like they do in most universities when a grad student teaches the class - technically a "prof" somewhere "oversees" the grad student teaching!! But that would be up to the different schoolsd and how badly they need a certified instructor.
Sad thing is that many places use who they have unless the class or program
requires someone be certified such as in most medical training!! I would hate to tell you how many technical classes are taught by instructors who are only 2-3 chapters ahead of the students in the text book :-( At some colleges you might have a "prof" with his PhD from 20-25 years ago in computers, teaching a class on current technology - nothing says that he "needs" to be "up-to-date" on ANYTHING - he is a PhD

The good thing is lots of them make money on the side writing technical books - so those instructors are up-to-date!!! Just ask your instructor what CURRENT CERTS he has and what has he done LATELY!!!!!!
Cisco Network Academy
In a Cisco Network Academy it just depends on "if" the classes count as regular classes at the college and transfer as discussed above. If they are Adult Education classes etc. then it is up to the school - all Cisco wants is for you to go through the "Train the Trainer" classes, which basicly means you found a school willing to have you teach for them and they send you for the training!!
To become a CCAI - Cisco Certified Academy Instructor you have to be Certified - like CCNA and then teach at least 1 semester of the CCNA class.
At ITT
At ITT you need to have a BA or BS or at least when I was about to teach for them a few years back - they pay very well and they had big bonuses for teaching Cisco classes - since I only had an AS I never got to teach for them.
Best thing is to talk to the school that you are interested in teaching at. Most only get subs from the adjuncts that teach for them already.
Hope this helps!
E.A. Broda
CCNA, CCDA, CCAI, Network +