Lesson 1: Is RPS Fair? (Grades 3-5)
Students play 30 rounds of RPS and record outcomes. Together, the class tallies wins for Rock, Paper, and Scissors across all games and compares to the expected ⅓ probability for each.
For teachers
Bring your whole class to rock paper scissors
Make a class in about two minutes, put the code on the board, and your students play each other from any browser. You run the bracket from your screen.
Classrooms open soon
We are finishing the notice for families with our lawyers before classes open. Tell us about your school and we will let you know when you can start.
Tell us about your schoolHow it works
1. Make a class
Give it a name and a grade band. You get a short class code, a QR code and a printable join sheet.
2. Students join
They open wrpsa.com/classroom/join, type the code and pick a nickname like "Otter 7". No email, no names.
3. Run a bracket
Press start: everyone is paired at random and plays on their own device while the bracket fills in on your screen.
Built for children
- Students give no personal information: no email, no name, no age.
- No chat and no free text anyone else can read.
- No ads and no analytics tracking on a student's device.
- Students never appear on public leaderboards, profiles or search. You can rename or remove anyone, and deleting the class deletes it all.
Lesson ideas
Lesson 2: Sample Size Matters (Grades 5-8)
Compare results from 10 rounds vs. 50 rounds vs. class-wide pooled data. Demonstrate that larger sample sizes converge toward expected probabilities.
Lesson 3: Game Theory Introduction (Grades 8-12)
Introduce the concept of Nash equilibrium using RPS. Show that a perfectly random strategy (⅓, ⅓, ⅓) is unexploitable. Then challenge students: if your opponent always plays Rock, what's your best strategy? What if they play Rock 50% and Paper 50%?