If you're a new instructor I'd recommend shadowing/assisting with some experienced instructors. It's not necessary but would help you build your network and get experience.
In general I find that women are better students (especially in beginner classes). Guys tend to think that they are endowed with the natural ability to drive, shoot, and fornicate (which we know are all learned/taught behaviors) and sometimes it's difficult to break through that thought process.
This became a lot longer than I initially thought it would be, but here are some ideas. There are lots of topics that are germane to carry that don't necessarily involve shooting a gun. Part of your job setting up an intro to CCW class should be exposing the students to important topics that they don't know, and giving them some idea of what type of info is out there. A lot of the stuff below is more advanced, but I think it deserves mention. It's up to you as the instructor how much time (if any) you want to spend lightly touching on more advanced topics. (And yes, I've had some of these mentioned in basic/intro carry classes).
Things of cover in a defensive class would probably be things like mindset of carrying (gun is not a talisman, they should get real combative type shooting training, avoidance is best but if you fight, fight HARD, etc). To steal a phrase from another instructor, the root word of gunfight is FIGHT, not "gun". Guns are just the best tool we have available right now.
Im not sure how much room you'll have, but the draw stroke is very important, especially incorporating movement while drawing, would be good to cover and have everyone practice if that's possible. Make sure you note that firing is possible from position 2 (i.e. Shooting from retention) and is preferable if you're really close to the target.
Something else to consider is actual terminal ballistics regarding how handguns actually stop people (blood loss or CNS destruction) which means for optimal effect your target is the heart and eye pro (for head shots). This should be a discussion about "this is where you shoot AND WHY", as well as how that target looks different at different angles like if the target is bladed to you as opposed to squared towards you. Explain that the target is not just "center of mass" - have them hold their fist over their heart and show them how small that target is and how difficult it might be to hit that while both they and the target are moving (this reinforces the "get more training" angle.
Some information about what to look for when someone may become violent (personal grooming, target glances, checking for witnesses, weight shift). There are some videos on YouTube that show these and might be good to show if you're in a classroom type setting. Also explain the OODA loop and how that applies to violent encounters. Some of the FBI stats on how many assaults are committed by multiple assailants could be good too.
And a final point about practice. Remind them that they don't get better by practicing just what they're good at. They get better by practicing what they are bad at. How many times do you go to the range and see everyone standing in a perfect stance, 2 hands on the gun, firing at a bullseye target? How often do you see a guy drawing, moving, shooting one handed (dominant or weak side), shooting strings of fire at multiple targets, or shooting from awkward positions? I guarantee you the second guy doesn't have nice, pretty groups to brag about, but who is better prepared to protect himself and his family?
(As a side note, practice shooting one handed for a while - especially weak hand - and then go back to shooting with a good 2 hand grip. When I do that, it almost feels like cheating how much easier it is to shoot and control recoil with a proper 2 handed grip
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This is a long list and would take more time than you have to fully cover, but it's just some general thoughts from some of the classes I've attended. Some of this is more advanced than a basic class and it'll be up to you to gauge your audience and what type of information they're looking for. A class full of guys on this forum would have different material covered (and in more depth) than a class pulled from random people in the community (which is more likely what you'll have). Have the students do a brief introduction at the beginning of the class so you can get a little bit of background on their experience level with guns in general and what type of training they have already had. If anything, you want them to leave knowing that there's a lot of information out there. You want them to know what they don't know.
Some of these may be hard to teach in a classroom without shooting, while others are hard to demonstrate but are easier to talk about (ever try to trick someone into target glances and pre assault indicators when they know what you're trying to get them to do? It's not easy)
Some of my favorite parts of classes I've attended were the stories told by the instructors (as part of the lesson). Don't go into just random stories, but use it if it helps get a message across. Real life examples are also good to use. Make the class interactive so it's not just you lecturing the students.
Also print out some articles for them to read (or email it to them as pre class "homework" and then have hard copies in the class and discuss them). One of the courses I took gave us a bound book with about 20 pages of articles on everything from mindset to terminal ballistics, to non-lethal options and I still occasionally take a look at it for a refresher.