DriveTest.ca website even says the camera shouldn’t be used for assisting, but this guy seems to want her to look at the tracing drawn by the rear camera to calculate the positioning and the turns she’s supposed to make. That sounds crazy to me. Should she look for another instructor? She was recommended this one by colleagues in her ESL school. This is for the G2 road test by the way.
Edit: I get that it’s useful to have the camera, but I guess what you are missing is that she’s not learning how to do it, she knows, she wants to know how to do it in the way the G2 tester expects her to do it.
If it’s not an accelerated course (as in, there will be another time your mother can try parallel parking) then in later lessons she can use the mirrors and wheel position more than the camera.
It is good for her to know that it would be better not to use the camera for the test. My car has no backup cam, and I’ve needed it 3 or 4 times in the last few years.