Lisa Russell's List of Web Sites Containing Lesson Plans
for Music Teachers

Lesson Plans.Com
Offers a wide variety of lesson plans from Composition to Dance & Movement, to Instruments and Dynamics. Every conceivable aspect of music instruction is touched upon.  Very well organized and designed. Well categorized and easy to navigate.

http://www.Lessonplanspage.com/

TeachNet.Com
This site does not have as much to offer as some other sites I've listed but the quality and usefulness of what it does have is very good.  The content of some of the lessons includes the use of internet resources.  This site also provides teachers with the opportunity to submit their own lesson plans.  
http://www.teachnet.com/lesson/music/index.html

Teachers.Net
A lesson bank feature is included which allows teachers to "withdraw" or "deposit" music lesson plans.  There is currently a wide variety of eighty lessons that are of good quality.  Not as well categorized or organized, as other sites I've listed, but extremely useful!
http://teachers.net/lessons/

Teach-Nology
Includes a fair amount of a wonderful variety of music plans including the planning of a one day music fair at school!  Very innovative!!!  Includes helpful resources for teachers.  Nice one.
http:www.teach-nology.com/teachers/lesson/_plans/music/

American Music Education Initiative
The lessons available at this site are written by music teachers and were submitted to and won awards from the National Music Foundation.  Although not very well categoraized, there are several Elementary level plans that are useful and innovative.  A must see!
http://lessons.usamusic.org/viewLessons.lasso