Some videos to help you get started:

Watch a 5 minute Ignite Talk introducing the idea of debate in math-- VIDEO.

See my classroom debates in action in this PBS VIDEO.

Hear a more thorough discussion in my Global Math Department VIDEO.

Some resources to start with:

See some examples of activities using THIS LINK. There are also slides from presentations available for download!

Some reflections on my blog:

Read some of my ideas on clopendebate.wordpress.com