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: 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.
Other
Music Lessons : Basic Music Theory 1
Basic music theory course includes clefs, treble and bass staffs, note duration and rests, a quiz section and answers, a download to Bay and a link to Music Notation 2. Good source for beginner theory students
OpenStax
Open Stax: Catherine Schmidt Jones: Listen to Balinese Gamelan: Beginner's Guide
A music-theory-type introduction to the gamelan music of Bali, Indonesia.