The document outlines a series of exercises to improve ear training skills over 18 lessons. It begins with exercises alternating between singing single tones and analyzing chords. Subsequent exercises incrementally add tones to recognize and increase the complexity of chord analyses. Later exercises expand the range of tones, test recognition of missing tones in scales and chords, and aim for universal recognition of tones across instruments. The final lessons encourage applying skills to various musical contexts and tuning instruments by ear alone. The goal throughout is 95% accuracy in tone recognition and singing.