Interesting notation style but not as functional as using numbers. There are many special functionalities that happen when you number each key. It allows beginners an any language to match the numbers and it allows you to see the half step interval relationships between any two notes. This makes it easy to learn while providing high end analysis of music elements. We tried NN with kids with learning disabilities and they were all able to read and play. It may be great for some of the kids you work with.