Music Theory articles usually tackle one or two key theory issues. Almost all instruction here is geared towards the performer. In other words, many articles try to explain how music theory knowledge translates into interpretation and performance.
Articles in Music Theory
Emotion and Music Theory in the Interpretation of Music Learn to Count (and Play!) Cross-Rhythms Three Important Things to See How to Use Modes for Improvising Form > Harmony Non-Chord Tones Modes of the Major Scale Cadential 6/4 Chords The Neapolitan Secondary Dominants Harmonic Rhythm Mixture Chords in the Minor Scale Forms of the Minor Scale Form in Music- Rondo Phrase Structures Chord Inversion ii, IV and vi Types of Cadences Form in Music