The Universal Edition is designed for all English-speaking countries outside of the United States, including Canada, the U. K., and Australia. This edition uses the British system of terminology for rhythmic values such as crotchet" for quarter note. This course is most effective when used under the direction of a piano teacher or experienced musician."
We used level 1A this year. If we were better at practicing (or enforcing practicing), we could have done more than that. There is a lot I like about this series. If you buy the whole set (which I did), the student is introduced to theory at the same time. Starts super-basic, which we needed. My only complaint is that you have to do a little snooping around in the books to figure out how the four of them weave together. I just made a chart, so that I only had to do this once and then refer to the chart for each lesson. Recommended. But do yourself a favor and make a chart.