And once again I will say, I talk about both. Pros vs Con's. Since it is a concealed carry class I will talk more about concealment vs OC. What they do outside of the class is up to them, I just know that the ones I've stayed in contact with carry conceal vs OC.
As for the "pros and cons" of OC vs. CC, let me guess what some of the "cons" are for OC that you discuss, based on my experience with other CC instructors:
1) you will be hassled by LE,
2) you will scare soccer moms and children,
3) someone will "grab your gun",
4) you will be a target in the event of a robbery.
OK, let's address these myths:
1) hassled by police--this is NOT a "con", it's actually a "pro". Every time police hassle an OCer, it gives us the opportunity to educate the system as to the 100% legality of OC in our state. Usually, they back off if you start quoting statutes and case law, and if they don't the courts almost ALWAYS rune on our side. Actually, cases involving lawful OC almost never make it to court in NC, because most DAs know how to research the law, and toss the charges before it makes it to court.
2) Again, if some citizen gets up in your face about OC, it is a PRO not a Con. It gives us the opportunity to educate them, hand them a brochure, or point them toward online case law and statutes. Public Relations is a VERY powerful tool in the battle toward "normalizing" defensive carry, and when people start to realise that OC is legal, they will not see it as something threatening or odd.
3) Gun Grabs... Please supply us with a SINGLE instance of this happening to an OCing citizen by a criminal in the State of NC (or even in any of our "border" states!)--EVER--in the history of this state. Then we can discuss just how silly this "argument" really is... Plus, most OCers use some level of retention holster--Serpas (level 2) or thumb-snaps--which make "gun grabs" very difficult.
4) Ditto #3. Please give a single, documented example of a lawful OCer EVERY being attacked specifically because the "bad guy" saw him OCin--in the history of NC. We'll wait...
Instructors should be giving information and advice based on fact, real-world experience, and using documented, legitimate information--NOT personal bias, urban myths, or anti-gun propaganda. Any time an instructor repeats one of these myths (gun grabs, being a target, etc) they do a disservice to lawful gun owners and the RKBA movement by perpetuating this disinformation.
They also insult the intelligence of their students and discredit the profession of "instructor" by giving their students information that is EASILY disprovable by anyone with half a brain and access to Goggle.
If you don't like OC and are a CC instructor, then don't talk about it. If someone asks, tell them the TRUTH--it's legal, and you don't need a permit, but it has many of the same restrictions that CC has with regards to prohibited carry locations.
But please don't perpetuate urban myths, anti-gun propaganda, and your own self-interest by spreading lies and disinformation. Such behavior is a disgrace to the teaching profession, and only serves to build distrust among your students.