Teaching in a computer classroom can easily take twice as long as teaching the same material in a demonstration setting. In general the more experience learners have on the Internet, the faster lessons can proceed. But remember that no matter what the skill level of the learners, everything will move more slowly in a hands-on classroom. If you want to cover a LOT of material quickly and leave your learners to explore it in depth at home, a faster pace may be acceptable. But if it's important that learners leave the class with some skills and experience, you'll have to allow for that when you plan your lessons.
Learners can only tolerate so much information before they have to pause and have a change of pace.
Plan your content to meet your goals. Once you know your essential goals and objectives and how much time you have to teach, you can begin to put your content together. I like to begin with a little brainstorming, making a list of anything that pops into my mind that could meet my objectives. I don't worry too much at this point about details, the idea is to get the thoughts on paper. After you create the list of ideas, select the ones that best suit the objectives, and create an outline of your training session.