Online resources

On the world schools format:
http://www.schoolsdebate.com

Good starter resource for students and teachers:
http://debateable.org/

International Debate Education Association (IDEA) - Karl Popper Format
http://www.idebate.org/

Debatabase (worked-out argumentation on over 500 topics):
http://www.idebate.org/debatabase/intro.php

General info on other formats: 
http://debate-central.ncpa.org/

Global Debate Blog:
http://globaldebateblog.blogspot.com/

Debate Central (University of Vermont)
http://debate.uvm.edu/