OpenStax
Open Stax: Catherine Schmidt Jones: Duration: Notes Lengths in Written Music
Read everything there is to know about the basics of notes. From their durations, their shapes and their stems, you will learn how notes are used in music.
Music Theory
Music theory.net: Note Duration
A fabulous resource for beginners in music theory! Gives examples and explanations of the sixteenth note, eighth note, quarter note, half note, and whole note. The last page on this site provides a chart showing the relationship of each...
Music Theory
Music theory.net: Rest Duration
A wonderful resource for teachers and students! Gives examples and explanations of rests and how they affect the sound of a musical piece. Simple illustrations and explanations make this animated site easy to follow.
Music Theory
Music theory.net: Dots and Ties
A terrific resource for beginners! Gives examples of dots and ties, and explains how they are used. Simple illustrations and explanations make this animated site easy to follow. By MusicTheory.net.