Dry practice on the line is fine.
Multiple people in a classroom handling guns is difficult to pull off without someone getting swept.
I have decided I will not handle guns in the classroom so that I am modeling what I expect of the students.
I know of other instructors that handle guns in the room. Their decision. But students doing it has too many issues to do it safely.
I have very poor posting talent so I want to try to clear up what I am saying. As an instructor I do not use a toy gun to make any points. I use a real gun and do not break any rules in front of the class. I know of many instructors that do. I witnessed and have seen videos of so called instructors sweep the class and themselves many times with both an unloaded gun and a blue gun. I do not do this. Ever. I do not teach in what not to do, but in what and how to do it. I allow all students to carry holstered or bagged into the classroom but they must got though a checkpoint if I am running a cold range. As far as a classroom setting I do not allow any handling of any types of firearms or toys by the class while they are sitting in the classroom. If it is in an indoor classroom (I do most everything outside for the last 10 years or so) the class is brought to the line as a safe table against a wall (no more than 4 per Range Officer at a time) to practice total presentations and dry fires, reholstering and mag changes and such. Any unattended students (I limit the number in my classes these days) are watched by another RO and/or sergeant of arms while I am busy. For larger groups, I pay my Range Officers out of my proceeds and they continue to help on the line as well. These are only RO's that I trust with my life.This has worked well for me for many years and I will stay with this format. My help is well trained in watching and interacting with the student so that I can have eyes behind my back so to speak. When I run a cold range, any student that leaves the room ( to pee or get something out of the car) has to go through my SOA before getting back in the class. When I run a hot range a student is dismissed if he handles his firearm at the wrong time including lifting half out his holster to manipulate a mag check, barney or mag change at the belt level. No exceptions. I try to maintain a relationship with all my students and invite them back for follow up sessions without charge to monitor their improvement. Many times as an invite we will set up a COF and have fun as well as continue learning through out the year. I am not saying what everybody else does is wrong but this is what I do and I can only speak for me.