This is a correction. Appreciate the viewer who brought the problem to my attention. Original video link is on End Screen. Or here: https://youtu.be/gHp8aKpH4mg Jane, a retired university math teacher, started this volunteer project in April 2009. Positive feedback from wonderful viewers worldwide keeps her motivated. Jane is a strong advocate of reading music. She made unconventional sight-reading lessons that simplifies reading music. https://sites.google.com/site/pianoandmathtutorials/sight-reading-lessons