Request from the U.S. Level 4?. First part: LH notes by pencil to avoid covering RH. Second part @ 4:50: Both hands Johann Sebastian Bach's Partitas (BWV 825--830) are six keyboard suites published between 1726 and 1730, and called Clavier-Übung I (Keyboard Practice). https://sites.google.com/site/pianoandmathtutorials/bach-s-partitas 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