Musictheory.net offers interactive lessons and training in music theory.  Lessons include signature, chords, intervals, cadence and phrasing, and scales.  After learning a part of music theory, you can practice it using the trainer interactive quiz tools.  The site also includes utilities to calculate chords, generate customized staff paper, and generate a matrix. There is also an app version of these lessons, but it is not free.

From site:  At this site, Phil shares a large number of free music activities and arts integration lessons that connect music to reading, math and science.  In addition, he posts information on his latest music education products.

Phil Tulga received his Bachelor’s and Master’s degrees in music from the Eastman School of Music in Rochester, New York.  He now resides in Sacramento where he presents educational programs at elementary schools, and is a member of the Jazz Studies faculty at CSUS.  Phil has been honored by the Mayor and the Sacramento City Council for his work in the area of arts education.  As a professional musician, he has performed with the Sacramento Symphony, Ballet, and Opera orchestras, as well as jazz/pop greats including Natalie Cole, Tony Bennett, Ray Charles, and Ella Fitzgerald. 

From site:  Journey with us as we trace the blues from its early beginnings in southern American fields to its global impact on music today. Through informative interviews and a wealth of music clips, you’ll learn the ins and outs of blues music and find out how the history of the blues has been brought to life on stage at the Kennedy Center.

From site:  The Youth Music Exchange transforms schools, after-school programs, and community-based organizations into record labels owned and managed by youths. The children write and record the music, develop marketing strategies, design the artwork, and sustain their company by bringing a youth-generated product to the community. YME puts not only media but also the media network into the hands of children in order to reinforce academic learning, social development, and career skills—all of which children need for success in the modern world.

Amazing interactive site designed to immerse kids in orchestral music – the music, the composers, and the instruments. Some of the features include an interactive timeline, excerpts of symphonies by classical composers, and sounds of different musical instruments.

Learn how to conduct an orchestra, the basics of music composition, notes, timing, and how to create your own composition.