Skills · Scales & harmony

Thumb-under & cross-over

Prepare the thumb and carry the scale line through the finger change.

Open this skill in the app →

Learn first

Next skills

Practised in these lessons

  1. Lesson 21

    One-octave parallel scale

    Hands in the same direction; watch the thumb-under.

    In Course 05 · Two-hand runs

    Open →
  2. Lesson 67

    C scale: right-hand thumb-under

    Play a one-octave scale up and down with consistent fingering.

    In Piano for adult beginners

    Open →
  3. Lesson 68

    C scale: the left hand's path

    Play a one-octave scale up and down with consistent fingering.

    In Piano for adult beginners

    Open →
  4. Lesson 69

    G scale: remember F sharp

    Play a one-octave scale up and down with consistent fingering.

    In Piano for adult beginners

    Open →
  5. Lesson 70

    F scale: thumb-under after finger four

    Play a one-octave scale up and down with consistent fingering.

    In Piano for adult beginners

    Open →
  6. Lesson 183

    Complete piece: the G scale becomes a song

    The G major scale as an eight-bar piece: up an octave, back down and home.

    In Piano for adult beginners

    Open →
  7. Lesson 89

    The staircase: thumb-under and cross-over

    The thumb passes under at F4, finger 3 crosses back to E4.

    In Piano for adults · Book 2

    Open →
  8. Lesson 187

    Complete piece: A walk across the octave

    A 12-bar piece beyond the five-finger position: thumb under, crossing over, and moving the hand during rests.

    In Piano for adults · Book 2

    Open →
  9. Lesson 93

    C scale: two different finger changes

    Play the scale hands together, each keeping its own fingering.

    In Piano for adults · Book 2

    Open →