I remember learning something about this in regular Music Education class, (not in Music Theory class), when I was in Elementary School. I don’t remember what grade I learned it in, but it was definitely sometime between Kindergarten and 6th Grade. The Music Teacher was teaching us this particular scale, but I forget now what it was called, and she was saying all Major Scales and all minor Scales are built from this scale because this scale was neither Major nor minor in quality, but it was also still a scale that was able to be played on an ordinary 12-key Piano tuned in 12-Tone Equal Temperament. Does anyone know what this scale is called? I don’t think it was the Solfège Scale, but I could be wrong. It definitely was not the C Major Scale, though, because that is a Major Scale, and it is also not between Major and minor in quality. The Music Teacher did, in fact, say that the scale I am asking about in this question is, in fact, between Major and minor in quality. I wish I remembered what she was calling that specific scale.
UPDATE: Just as Natural is between Flat and Sharp, the scale I am asking about is the BASIS for ALL minor Scales AND Major Scales.