Since the birth of the internet, piano tutorials are no longer limited to the hallowed halls of academia or the family room of a local piano teacher, but are now widely available on the net with just a click or two of a search engine button.

Here are a few musical tutorials:

9th chords

Diminished 7th chords

Key signatures: flats

Key signatures: sharps

And of course there are many, many more.

An individual in his or her home has access to countless musical tutorials on the web — all they have to do is search a bit.