First Principle: Repetition with variation makes practice fun. Mix it up!
Each hand is a “mirror” of the other. The “2” finger on the left hand (index) mirrors the “2” finger on the right hand, so singing/knowing WHICH HAND that fingering is for is part of the game. (Left hand 2!)
The standard fingering convention is:
Thumb = 1
Index finger = 2
Middle finger = 3
Ring finger = 4
Little finger = 5
Level 1, (2 repetitions)
Level 2, (2 repetitions)
Level 3, (2 repetitions)
Level 3, (with singing, of the fingerings), (2 repetitions)
Level 4, (with fingerings), (2 repetitions)
Level 4, (without fingerings), (2 repetitions)