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      Classical music in the 20th century

      I can explain how classical music developed in the 20th century, identifying key features and genres.

      Copyrighted materials: to view and download resources from this lesson, you’ll need to be in the UK and

      Lesson 5 of 5
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      New
      • Year 10
      • AQA

      Classical music in the 20th century

      I can explain how classical music developed in the 20th century, identifying key features and genres.

      Copyrighted materials: to view and download resources from this lesson, you’ll need to be in the UK and

      Lesson details

      Key learning points

      1. In the 20th century, classical music developed in various different ways.
      2. Many composers used non-functional harmony, while some experimented with atonal and microtonal music.
      3. Experimental composers challenged core principles of the Western Classical Tradition (e.g. silent music, chance music).
      4. Minimalist composers wrote mostly diatonic music based on repeating ostinati and gradual changes.

      Keywords

      • Atonal - music which has no key or tonic note

      • Minimalist music (minimalism) - a style of music that emerged in the 1960s in the USA, defined by its repetition of minimal musical ideas

      • Non-functional harmony - where chords don’t have their traditional roles (e.g. chord V resolving to I, using mostly primary chords)

      • Experimental music - music that radically challenges what we think of as 'normal' music

      • Ostinato - a short, repeating musical idea (plural: ostinati)

      Common misconception

      Non-functional harmony sounds the same as functional harmony.

      While some of the chords might be the same, the difference is in the role. In functional harmony, chords have specific roles (e.g. V coming before I to create resolution). In non-functional harmony, any chord can be used whenever the composer wants.

      This content is designed primarily for schools following the AQA specification, of which this is a compulsory part of the course. However, other schools may find it useful to use this lesson to provide some broader learning for pupils and to consolidate some of the earlier learning from the unit.
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      This content is © Oak National Academy Limited (2026), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

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      Lesson appears in

      UnitMusic / The Western Classical Tradition: extended

      AQAMusic

      EdexcelMusic

      EduqasMusic

      OCRMusic