The following links may be useful to you:

Junior GEVA:  
       http://www.geva.org/juniors/girls/index.php

USA Volleyball: 
       www.usavolleyball.org

NCAA Clearinghouse:  
       http://www.ncaaclearinghouse.net/ncaa/NCAA/common/index.html

Section XI: 
       www.sectionxi.org