re: Liability of teaching a class in my shop - Canada

Like Abbas said I don’t know about Canada but when I’ve taught out of my shop I have a rather extensive disclaimer I have students sign and have separate liability insurance. When I teach for my local community college the high school shop that lets us use their shop has insurance .
I know a couple other people that teach across the US that don’t bother with insurance at all but limit the use of the scariest tools like table saws and chop saws to students especially New Bs. one of them instructs students on how to use table saws but makes all their cuts for them.