I taught both of my children how to drive a manual. My only suggestions are to spend a bit of time explaining how the clutch works and it’s purpose. Emphasize that its purpose is NOT to use to match the speed of the flywheel to the input shaft of the tranny (speed of the engine to speed of the tranny)…that should be done with the gas pedal. It’s purpose is solely to allow the driver to engage and disengage the two with the speeds being as consistant as possible. Except when starting out, and then slippage should be as little as practicable.
The take them for hours of hands-on in all sorts of conditions…bring along a whole heaping truckful of patience.
Honestly, I doubt if either of my kids remembers the “matching speeds” part, but I think it helped them visualize what they were doing until they got the feel. At least that’s what I tell myself.