Thanks, but would you flesh out those visual aids? I'm not familiar with either.
The styrofoam cup visual aid:
Hold a styrofoam cup upside down and write 30, 60, 90....360 in (obviously) 30-degree increments around the top of the cup, which is on the bottom as you’re holding it. Looking at the cup, 60 will be to the left of 30, 90 will be to the left of 60, etc., just like a whiskey compass. Or you could just do N, E, S, W if you choose.
take a pencil and poke it through the cup, entering above 360 (or N), and exiting above 180 (or S). The point of the pencil points north, so as you’re facing north, you see the eraser end of the pencil above 360 (or N). The pencil is the magnet, and the pointy end points toward the north magnetic pole.
As long as the compass is vertical, it’s accurate. But the earth’s magnetic field isn’t parallel to he surface of the earth. If you initiate a left turn from north, the compass will bank with the airplane. In the northern hemisphere, the pointy end of the magnet will get pulled down (the north magnetic pole isn’t at your altitude, it’s under the surface of the earth), and the compass will indicate a turn to the right initially, and lag behind the actual heading, with the error decreasing until you get to west, at which point there will be no turning error.
same for acceleration/deceleration on east/west headings.