The School's Mace is the oldest and largest, nationwide debating competition where debates are centred around topical issues and current affairs. It enables students to come and debate in pairs to represent their schools.

In the first round of this year’s tournament Dominic Storey and Dan Chapman represented Challoner's and debated against Berkhampstead away from home, arguing in support of the motion to lower the legal voting age to 16.

Debates were each about 50 minutes long, going back and forth between the proposition and opposition before opening questions up to the floor and then some concluding remarks. Despite the unfamiliar format and fierce opposition from Berkhamsted, Challoner's came through to win and have subsequently progressed to the second round and will be debating St Albans High School. They will be in favour of the motion supporting the use of all-women shortlists to redress the parliamentary gender imbalance.

Debating at Challoner's is one of the most fun and accessible extracurricular activities, with students from all years and experience levels able to take part.