Piano scales and arpeggios grades 1, 2, 3, 4, 5. Easy to play. Learning with hands together is simple with this method. Clear rules or anchor points for each scale and arpeggio identify where fingers in both hands play simultaneously. Learning and applying these rules fixes the finger coordination and make the learning process easier, quicker and more secure. There are only 5 scale groups and three arpeggio groups. ie group one contains 13 scales with the same rule: 'Both left and right hand 3rd fingers play together throughout'. It's easy! Think of the rules and watch your hands. It is a valuable tool for all pianists.