Added score to old tutorial. Level 5. Zhu Xiao-Mei: https://youtu.be/Cq2EtAK38xk https://sites.google.com/site/pianoandmathtutorials/bach-s-goldberg-variations 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