middle c
"However, here is where you START - with the look at Grand Staff Visual Simplification. The Grand Staff is perfectly symmetrical. With the treble and and bass staves looking at each other as if in a mirror. Middle C is like the zero point in a thermometer and all other lines and spaces can be counted in reverse direction. Here are three images of what is meant: "
"I think of and teach that Middle C is like a dotted line ---------------- that you could fold the music at and have two mirrored graphics that match. Playing in contrary motion from Middle C would also show this association both in matching graphics on the keyboard, and on the grand staff. Symmetrical! I do keyboard eyboard orientation as a first step to a beginner."
...-3,-2,-1,0,1,2,3...
An example of symmetry.

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