On Friday, October 9, the Norwegian Nobel Committee awarded the 2026 Nobel Peace Prize to Navi Pillay. That got me thinking about the prize itself, and about how much a simple picture of its history could tell our students.
So I made one. It's a grid of 126 dots. Most are filled. A few are empty. There's no title, no labels and no key.
If you're anything like me, you love a graph that starts a conversation before anyone knows what it shows. That's the whole idea behind a slow reveal: students reason about the data first, then get the context a little at a time and revise their thinking as they go. This one takes about 40 minutes, and it works as a 10-minute warm-up if you're short on time.
So ask your students: What does this chart actually measure? What does it leave out? It doesn't tell us who won, how many people shared a prize or whether the winner was a person or an organization. Every data display makes choices, and our students should be the ones asking about them.
Then finish with the question I keep coming back to:
If you could measure peace using only 3 numbers, what data would you want to know?
Have students write their three numbers, then answer one more: What would your 3 numbers miss? There's no right answer here, and that's the point. Students have to decide what counts, and that's where statistical thinking starts.
Grab the Resources
Everything is free and ready to go. The slides include speaker notes with answers on every slide and a teacher answer key at the end.
Slides: Nobel Peace Prize Slow Reveal
Lesson plan: What Can 126 Dots Tell Us About Peace?
If you try this with your students, I'd love to hear their three numbers. Tag me @MrPurdyMath and show me what they came up with.
So I made one. It's a grid of 126 dots. Most are filled. A few are empty. There's no title, no labels and no key.
If you're anything like me, you love a graph that starts a conversation before anyone knows what it shows. That's the whole idea behind a slow reveal: students reason about the data first, then get the context a little at a time and revise their thinking as they go. This one takes about 40 minutes, and it works as a 10-minute warm-up if you're short on time.
Reveal 1: Just the Dots
Start with nothing but the dots. Give students a full minute of quiet think time before anyone talks, then ask the two best questions in math class: What do you notice? What do you wonder?
Write down every idea without confirming or correcting it. Students usually spot the rows of 10 first, then the empty dots clustered near the top, then the fact that the bottom rows have none at all. Someone will probably ask why the first row starts one space in.
Then ask the counting question: How many dots are there, and how did you count them? You'll get one-by-one counters and row counters. Push for the efficient strategies: 12 full rows of 10, minus 1 at the start, plus 7 at the end. Or 13 rows of 10, minus the 4 blank spaces. Either way, 126.
Now add the labels. Decades run down the side, digits run across the top and the last dot, 2026, gets a ring. The headline is just "Each dot is a year."
This is where the conversation picks up. Which decade has the most empty dots? When was the last empty one? What could the empty dots mean? Have students turn and talk and back up their guess with evidence from the grid.
Expect a lot of students to guess wars, and they're partly right. The 1910s and 1940s are full of gaps. But then someone points at 1972 and the 1920s, and the theory gets more interesting. Don't confirm anything yet.
One thing to watch for: a lot of students will say the grid covers 125 years, because 2026 − 1901 = 125. Have them check with a smaller case, like 2020 to 2026, and they'll see why both ends count. It's 126.
Here's the answer. Each filled dot is a year the Nobel Peace Prize was awarded. Each empty dot is a year with no prize. That's 107 years awarded and 19 years without, and the newest dot belongs to Navi Pillay, the South African jurist honored this year for her work for peace and international law.
I like to ask, "Which of your predictions held up?" before we do any math. It's a great moment to celebrate good reasoning, even when the guess was wrong.
What fraction of years had no Peace Prize? About what percent is that?
What percent of the 1940s had no prize?
Compare the rate of empty years before 1973 with the rate since. What changed?
The answers tell a story. Overall, 19 of 126 years had no prize, or about 15%. In the 1940s it was 5 out of 10, a full 50%. From 1901 to 1972, 19 of 72 years were empty, about 26%. Since 1973? Zero. Every single year for 54 years straight.
That last comparison is my favorite part, because it's real ratio reasoning with a real question attached: what changed?
Write down every idea without confirming or correcting it. Students usually spot the rows of 10 first, then the empty dots clustered near the top, then the fact that the bottom rows have none at all. Someone will probably ask why the first row starts one space in.
Then ask the counting question: How many dots are there, and how did you count them? You'll get one-by-one counters and row counters. Push for the efficient strategies: 12 full rows of 10, minus 1 at the start, plus 7 at the end. Or 13 rows of 10, minus the 4 blank spaces. Either way, 126.
Reveal 2: Each Dot Is a Year
Now add the labels. Decades run down the side, digits run across the top and the last dot, 2026, gets a ring. The headline is just "Each dot is a year."
This is where the conversation picks up. Which decade has the most empty dots? When was the last empty one? What could the empty dots mean? Have students turn and talk and back up their guess with evidence from the grid.
Expect a lot of students to guess wars, and they're partly right. The 1910s and 1940s are full of gaps. But then someone points at 1972 and the 1920s, and the theory gets more interesting. Don't confirm anything yet.
One thing to watch for: a lot of students will say the grid covers 125 years, because 2026 − 1901 = 125. Have them check with a smaller case, like 2020 to 2026, and they'll see why both ends count. It's 126.
Reveal 3: The Nobel Peace Prize
Here's the answer. Each filled dot is a year the Nobel Peace Prize was awarded. Each empty dot is a year with no prize. That's 107 years awarded and 19 years without, and the newest dot belongs to Navi Pillay, the South African jurist honored this year for her work for peace and international law.
I like to ask, "Which of your predictions held up?" before we do any math. It's a great moment to celebrate good reasoning, even when the guess was wrong.
Do the Math
Once the context is out, the numbers start to matter. Put students in pairs with these questions:What fraction of years had no Peace Prize? About what percent is that?
What percent of the 1940s had no prize?
Compare the rate of empty years before 1973 with the rate since. What changed?
The answers tell a story. Overall, 19 of 126 years had no prize, or about 15%. In the 1940s it was 5 out of 10, a full 50%. From 1901 to 1972, 19 of 72 years were empty, about 26%. Since 1973? Zero. Every single year for 54 years straight.
That last comparison is my favorite part, because it's real ratio reasoning with a real question attached: what changed?
Does an Empty Dot Mean No Peace?
This is the question I don't want students to skip. It's tempting to read the empty dots as the years the world wasn't at peace, but that's not what the chart measures. It shows whether a committee in Oslo awarded a prize. Some empty years line up with the World Wars. In others, the committee simply decided not to give the award.So ask your students: What does this chart actually measure? What does it leave out? It doesn't tell us who won, how many people shared a prize or whether the winner was a person or an organization. Every data display makes choices, and our students should be the ones asking about them.
Then finish with the question I keep coming back to:
If you could measure peace using only 3 numbers, what data would you want to know?
Have students write their three numbers, then answer one more: What would your 3 numbers miss? There's no right answer here, and that's the point. Students have to decide what counts, and that's where statistical thinking starts.
Grab the Resources
Everything is free and ready to go. The slides include speaker notes with answers on every slide and a teacher answer key at the end.
Slides: Nobel Peace Prize Slow Reveal
Lesson plan: What Can 126 Dots Tell Us About Peace?
Data sources:
- Nobel Prize facts, NobelPrize.org
- Navi Pillay, 2026 Nobel Peace Prize, United Nations
If you try this with your students, I'd love to hear their three numbers. Tag me @MrPurdyMath and show me what they came up with.
I'll be posting new data talks each week! - Get access to more data talks here.
Comments
Post a Comment