The Texas School Music Project has a great site with links to tips for all band instruments. http://www.tsmp.org/band.htm
Brian Kay, a Boston-area brass instructor (specializing in trombone), has many resources located at: http://www.BrassStages.com
Brass fingering charts http://www.musicteachersnet.com/syllabus.jsp
http://www.csupomona.edu/~dmgrasmick/mu330/BrassInstrumentFingerings.html
METRONOME http://www.metronomeonline.com
Blank Sheet Music http://www.blanksheetmusic.net/
Instrument repair Instrument repair http://www.napbirt.com
Listening and music purchases:
http://www.jwpepper.com
listeninglab.stantons.com/concert_band.php
http://www.musiceducationonline.org
http://www.schooltube.com/video/33631/Concert-Etiquette
http://www.schooltube.com/
An example of a reel
http://talent.itv.com/videos/video/item_200080.htm
http://nyssma.org/
nysbda.org
http://www.watertowncsd.org/index.cfm?bid=9&cid=1128
http://listeninglab.stantons.com/Concert_Band.php
http://www.watertowncsd.org/index.cfm?bid=9&cid=41
http://www.childrensmusicworkshop.com/instruments/brandnames.html