WADL has hosted the National Championships four times, doing so most recently in 2004. Since the Championships inception, WADL has won the event three times and been runner-up on a further three occassions. WADL students competing in the National Championships have frequently been selected as members of the Australian Schools Team to compete at the World Schools Championship, where Australia has the best record of any nation.

The most recent WADL debaters to be selected for the Australian Team are Ryan Steed (2005) , Eleanor Bensley (2003 / 2004) and Varun Ghosh (2003).