A very good interactive theory site with free theory drills,interactive theory and links to learning sites.Very user friendly with excellent dictation drills and covering every type of musical scale.
The first 4 chapters cover counting rhythms,reading notes,reading syncopation, and accents and markings in music, and are free. If you wish to continue this course there is monthly fee. The site is informative but not interactive.
This is a truly wonderful site for anyone who wishes to improve their understanding and aural perception of harmony. The seven harmonies are the basis of Western music, and they can be learned by listening to example tracks while watching the on screen symbols.
Big Ears plays a random interval and then allows you to guess which interval was played. Each time it plays an interval, it randomly selects a starting pitch. Big Ears has a range of two octaves and chooses pitches chromatically (it does not stick to a diatonic key).
This is a very useful site for music students who wish to find out about composers, with overviews of the 6 main musical periods in music history.There are sound clips of all the music mentioned too plus a glossary of 200 definitions with numerous musical examples. You will need Real player to listen to the music on this site.