World Schools Debate: the three-on-three format

World Schools is the format used at the World Schools Debating Championships and, since 2016, at the NSDA National Tournament. Teams of three argue motions that range from policy to values to philosophy, half prepared in advance and half announced an hour before the round. It is the most conversational format in the activity and the best one for learning to persuade an ordinary listener.

By Andrew Thomas, Charlotte Urban Debate League | Published August 25, 2026 | Updated September 2026 | 8 min read

The round

The proposition supports the motion; the opposition argues against it. Three speakers on each side give eight-minute substantive speeches in alternating order, then each side gives a four-minute reply speech, opposition first. The reply is delivered by the first or second speaker, never the third.

Order	Speech	Time
1	Proposition 1	8 min
2	Opposition 1	8 min
3	Proposition 2	8 min
4	Opposition 2	8 min
5	Proposition 3	8 min
6	Opposition 3	8 min
7	Opposition reply	4 min
8	Proposition reply	4 min

Points of information

During substantive speeches, between the first and last minute, opponents may stand and offer a point of information: a short question or statement, fifteen seconds at most. The speaker chooses whether to accept. Take two or three per speech and answer them briefly; refusing every point looks evasive and accepting every one destroys your structure.

Motions

Motions are phrased "This House would..." or "This House believes that...". Prepared motions are released weeks in advance. Impromptu motions are announced about an hour before the round, and teams prepare without coaches or outside materials. The NSDA publishes sample motions monthly; use them for practice.

Speaker roles

First speakers define the motion, set out the team's case (the "case line" in one sentence), and deliver the first arguments.
Second speakers rebut the other side and extend the case with new arguments.
Third speakers rebut in depth and summarize; they bring no new arguments beyond new examples.
Reply speakers give a "biased adjudication": the round from your side's point of view, focused on the two or three clashes that decide it.

How judges score

Judges score each speech on style (delivery, clarity, persuasion), content (arguments and evidence), and strategy (structure, choices, handling of points of information), typically weighted 40, 40, and 20. Speed is penalized. A judge should be able to follow every argument without a flow.

Building a case

Write the case line: the one sentence that explains why your side wins.
Identify the two or three arguments that support it, each with a mechanism (how the harm or benefit happens), an example, and an impact.
Decide the definitions and the model (for policy motions, what your side would actually do) and make them reasonable. Unfair definitions lose rounds.
Assign arguments to speakers and rehearse transitions.

Why coaches like it

World Schools develops general knowledge, teamwork, and the ability to argue anything on short notice, and it does not depend on an evidence budget. A CUDL partner school with six interested students can field two teams. For impromptu practice, use the prompt generator and our impromptu guide.