Here are links to some professional organizations mentioned in this site:
YouTube: www.youtube.com/professorlesser
The Philadelphia Wind Symphony: www.philadelphiawindsymphony.org
New Jersey Music Educators Association: www.njmea.org
Teachers Pay Teachers: www.teacherspayteachers.com/Store/Andrew-Lesser-Music
Musica Propria Publications: www.musicapropria.com
Kjos Publications: www.kjos.com
Grand Mesa Music: www.grandmesamusic.com
J.W. Pepper: www.jwpepper.com