Suggested for beginners that are 6 - 7 years old;
 
later levels work well for intermediate level students
One of my two go-to series for most young beginners, this series excels because of it's broad approach to music education. I tend to use this with students that don't work well with fast-paced lessons and need variety (in terms of music styles and types of activities in the theory book) to keep engaged. Also, students tend to like the activities in this method compared to my other go-to below. If you need a link to a specific book in the series, please contact me!