Music Theory Websites
abrsm.org
ABRSM is the exam board of the Royal Schools of Music, delivering over 600,000 music exams and assessments every year in over 90 countries.
74,171 
$ 180,720.00
scales-chords.com
Free online resources and tools to help you learn and compose music, scales and chords, for guitar and other instruments.
61,286 $ 218,880.00
teoria.com
Web site dedicated to the study of Music Theory. Articles, reference, interactive exercises.
87,073 $ 154,080.00
mymusictheory.com
My Music Theory for free online music theory lessons. Video courses, exercises, downloads and worksheets also available. ABRSM Grades 1-8.
302,068 $ 27,000.00
method-behind-the-music.com
The Method Behind the Music is a resource for information on music theory, conducting, the physics of sound, and the history of music.
319,183 $ 25,920.00
lotusmusic.com
See music theory like you've never seen it. These tools and books offer a unique approach to the circle of fifths, chord progressions, and scales.
No data $ 8.95
basicmusictheory.com
Music theory for notes, intervals, scales, modes, chords, circle of 5ths, with midi and mp3 audio, piano, treble and bass clef diagrams in all keys
129,762 $ 85,200.00