https://www.musical-u.com/learn/the-secret-to-mastering-music-theory-with-shranny/
What could possibly be exciting about memorizing 15 key signatures? And scales, scales, scales! What if there was just one place, one rule that ruled them all, one secret to understanding all the key signatures, chords, chord progressions—even those awful, endless scales? https://www.musical-u.com/learn/the-secret-to-mastering-music-theory-with-shranny/