Twenty One

Choose this exercise

Purpose: Rank a pool of participant-generated ideas objectively through pairwise scoring without exposing original authors.

Use it when: Use when a team needs to quickly narrow down a large list of brainstormed suggestions, action items, or debrief takeaways to the top three to five priorities.

Skip it when: Skip when the group has fewer than six people, when options require extensive technical analysis before evaluation, or when ideas must be strictly attributed to their authors.

Group arrangement: Individual card writing, moving pairwise discussions, and whole-group tallying.

Timing: 15 minutes suggested by UWT based on three 1-minute scoring rounds, shuffling, and whole-group tallying.

Materials and tools

• One 3x5 index card per person
• One pen or pencil per person
• One flip chart or whiteboard
• Two dry-erase markers

Before participants arrive

1. Prepare a clear prompt or guiding question and write it prominently on the whiteboard.
2. Ensure open floor space where participants can move around freely and form pairs easily.

Say this to open

We are going to use an activity called Twenty One to evaluate our ideas fairly. On one side of your index card, write the letters A, B, C, and Total stacked vertically. On the blank side, write one concise response to our prompt. Keep it legible and anonymous. Once written, we will shuffle the cards so nobody evaluates their own card.

How to run it

1. Write and format cards 3 minutes

   Distribute one index card and a pen to each participant. Direct everyone to write A, B, C, and Total along the left edge of one side. Ask them to flip the card over and write one clear idea answering the prompt. Example prompt: 'What single change would improve our team meetings?' Example response: 'End all meetings 5 minutes early.' Do not put names on cards.

2. Shuffle cards 2 minutes

   Ask everyone to stand and walk around the room, continuously trading cards face-down until thoroughly mixed. Call freeze. Instruct everyone to check their card. If anyone holds their own card, have them trade once with a neighbor.

3. Run Round A and swap 2 minutes

   Direct participants to form pairs. Partners read both cards and agree on how to split exactly 7 points between them based on preference (for example, 5 points to one and 2 to the other). Each person writes their card's score next to letter A. When scored, participants mill, trade cards face-down several times, ensure they do not hold their own card, and find a new partner.

4. Run Rounds B and C 3 minutes

   In new pairs, participants read their cards and allocate a fresh 7-point split. Each person logs their score next to letter B. Participants mill, swap cards repeatedly, verify they do not hold their own card, and find a third partner. Partners negotiate a final 7-point split and record it next to letter C.

5. Tally and reveal top priorities 3 minutes

   Ask participants to sum the three scores on their card (A + B + C) and write the number next to Total. Call out numbers descending from 21 down to 15. When someone holds a matching card, they read the idea aloud. Write the top 3 to 5 ideas on the whiteboard.

6. Debrief 2 minutes

   Gather the group around the whiteboard. Invite 2 or 3 participants to comment on the final list using the debrief questions.

Debrief questions

• Looking at the top-ranked ideas on the board, what common themes or patterns stand out?
• How did evaluating ideas without knowing who wrote them change the way you scored them?

Finished output: A posted list of the group's top 3 to 5 prioritized ideas with their final scores out of 21.

Remote

Use an online collaborative whiteboard (such as Miro or Mural) with anonymous sticky notes. After participants write their notes, the facilitator shuffles them onto a grid. In three breakout room rounds (pairs), partners pick two assigned notes, negotiate a 7-point split, and type the scores into the note fields. The facilitator sorts by total score in the main room.

Hybrid

In-person and remote participants cannot easily shuffle physical index cards together. Run the activity entirely on a shared digital board where all participants, whether in the room on laptops or remote, edit anonymous digital cards and use online breakout rooms for the scoring pairs.

Access and participation choices

• Participants with limited mobility may remain seated while standing participants rotate to them, or participate via verbal agreement while a partner writes.
• Any participant may submit a blank card or pass on contributing an idea, simply acting as a scorer during the pairwise rounds.

If the session gets stuck

A pair cannot agree on a 7-point split before the round timer expires.

Remind pairs that 7 cannot be split evenly; prompt them to use a quick coin flip or rock-paper-scissors to decide the 4-3 split rather than debating endlessly.

An odd number of participants leaves one person without a partner.

Have the facilitator step in as an active scoring partner, or create one triad where two members share one card and score together against the third member's card.

Terms used here

• 7-point split: A scoring rule where two compared cards must share exactly seven whole points (such as 7-0, 6-1, 5-2, or 4-3).