OK, you are talking about computer training.
If you have a deep-seated love for teaching, it might be OK. I've seen it in action, and I think it would make most people go postal.
There are a couple of companies in our city that do this. They come in, do a "needs analysis" to see what kind of training is needed on the applications the company uses, then propose a training plan. They create the training handouts (usually pretty fancy) and either some canned demos or live sessions that they use in front of the class.
Many of the "students" have no interest in learning, don't like computers, and feel like if they become more productive, then "the company is getting more out of me for nothing". So they either blow off class, sleep through it, or fake the exercises. The few people in the class who know what they are doing ask advanced questions which baffle the rest of the class.
I had training in Microsoft Office applications, because it was mandatory. It was the equivalent of a week-long Dilbert.
I think it takes a special type of person to handle that. At least with high-school students you can fail them. College students are paying to be in class. But corporate training has an audience of uninterested people who are more concerned with looking stupid than learning anything.
It might be better to do computer training for executives which would mean one-on-one training in an office with a corporate bigwig. Those types of people don't "go to class" with the common people. You'd probably make more money and only have to deal with one person at a time.