Request from Argentina. Level 5. https://sites.google.com/site/pianoandmathtutorials/czerny-exercises-for-the-left-hand 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