General Resources
Interactive Jazz for Kids - PBS Kids Go!
Teen Jazz - A website for all teen musicians, with an emphasis on saxophone
NPR's Jazz and Blues - Large. Highlights include: Interviews & profiles, "Discover a Song", and streaming media.
A Jazz Improv Primer (advanced) - Outside Shore Music
History
The History of Jazz and its most important musicians - NEA Jazz in the Schools
Wynton Marsalis presents the history of Jazz (online video) - Joy to Learn Foundation
The Roots of Jazz (animated video) - Jazz in America with Herbie Hancock
A Great Day in Harlem - Discover the most famous photo in Jazz History
"Red Hot Jazz" - Focuses on jazz before 1930 - Their performer and band archive is particularly stong!
All about Duke Ellington - Scrapbook & Inter-Activities (lessons) are the most fun/useful
Instrument Specific
Discover Rock and Roll Saxophone - Audio, History, Articles and more
Jazz Trumpet Solos - Play along with some of the greatest jazzers of all time
JazzFlute.com - All things Jazz and Flute (Jazz and more)
Multimedia
Jazz on AccuRadio - Free Internet Radio with sub-channels for sax, trumpet, drums, guitar and others