Expression

A type of articulation indicating the player to play smoothly and seamlessly, with the notes slightly overlapped.

Intervals

Two notes played in succession, usually in one hand but sometimes in both, whose distance is the interval of a 3rd of any quality.

Scales

A hand position where both the right-hand thumb and the left-hand thumb share middle C.

Notation

Symbols that indicate playing a note or range of notes either an octave higher or lower than notated.

Expression

An indication instructing the player to play softly.

Meter

A time signature where the fundamental beat is subdivided into groupings of two.

Rhythm

Symbols indicating that two notes are to be played as one with the value equal to their sum.