Wouldn't it be mandatory and you'd have to take it either way? If its to graduate.

Sounds like OP is a minor in high school and needs parent/guardian permission (American schools are picky about that). Show her the form that says the class is mandatory, and that common sense and intellect won't get you an exemption. Get the school to explain it to her, if that doesn't work. Good luck, OP.

Well.. Sign yourself up, OP. Sorry your mum is such an idiot..

well get tutorials elsewhere

If she's ever choking, use that as an argument before actually doing something

the Heimlich maneuver and CPR are two completely different things and CPR covers things that are NOT common knowledge

Just a thought...if your old enough to graduate wouldn't you be old enough to sign up for and attend your own classes?

Ipp

Clearly something she never had

... i think you need to take that class since you use CPR mostly to resusciate someone after they stops breathing, not when they are choking.