Note Naming Exercises:  http://www.musictheory.net/exercises/customize
Customize the exercise by selecting the clef and highest / lowest note.  Then use the code at the bottom of the page to access your exercise

Xylophone Exercise: http://www.vicfirth.com/education/keyboard/speednotereading.html

Vic Firth Percussion: www.vicfirth.com

Music Alive!  magazine: www.mymusicalive.com

Learn about jazz music: http://pbskids.org/jazz/