All books/Purposeful Nano Classroom Activities for Effective Teaching
Chapter 1522 min read

Ask the Winner

Activity illustration

At a Glance

  • Time: 3-4 minutes
  • Prep: Minimal (prepare problem)
  • Group: Whole class
  • Setting: Any
  • Subjects: Math, Science, Problem-Solving
  • Energy: Medium-High

Purpose

Leverage peer instruction by having students who solved problems correctly explain their process to those who didn't, solidifying understanding for both explainer and learner.

How It Works

  1. Silent problem solve (1-2 min) - Students work problem individually without talking
  2. Reveal answer (15 sec) - Teacher shows correct answer; those correct raise hands
  3. Find and learn (2 min) - Those incorrect find a "winner" to explain the solution process

What to Say

Opening: "Solve this problem silently: [displays problem]. When I reveal the answer in 90 seconds, if you got it right, raise your hand. If not, find someone with their hand up to explain it to you."

During: [After reveal] "Hands up if you got 42!... Everyone else, find a raised hand and ask: 'How did you get that?' Winners, explain your process step-by-step."

Closing: "Winners solidified their understanding by teaching. Learners got personalized help from a peer who just solved it. That's how knowledge spreads."

Why It Works

Peer instruction is highly effective—students who just solved a problem can often explain it more accessibly than the teacher. Explaining deepens the winner's understanding; receiving peer help reduces stigma.

Research Connection: Peer teaching improves achievement for both tutor and tutee (Topping, 2005; Roscoe & Chi, 2007).

Teacher Tip

Circulate during explanation phase. Listen to explanations—they reveal whether "winners" truly understand or just got lucky with the right answer.

Variations

Subjects: Math problems, science calculations, logic puzzles, coding challenges • Complexity: Single-step problems (quick) to multi-step (longer pairs) • Ages: K-5: simple problems; 6-12: standard; College: complex proofs/derivations

Online

Use breakout rooms. Winners auto-assigned to rooms with 2-3 learners. Screen-share work while explaining.

Troubleshooting

Not enough winners: "If few got it right, I'll explain first, then you practice a similar problem with this method"

Extension

After peer explanation, give a similar problem. Check if learners can now solve independently.


Related: Peer Teaching Pairs, Think-Pair-Share